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Book Sudoku for Ninjas BOOK 5

    Book Details:
  • Author : The Masters
  • Publisher :
  • Release : 2019-12-31
  • ISBN : 9781653545025
  • Pages : 111 pages

Download or read book Sudoku for Ninjas BOOK 5 written by The Masters and published by . This book was released on 2019-12-31 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sudoku Very Hard. Difficult, Evil, Genius Level Sudoku. Blackbelt, Ninja Level Sudoku. Brand New Sudoku Book With Never Before Seen Puzzles. 300 Very Difficult problems with their solutions Sudoku has rapidly become the world's most popular numbers game. It's played by millions of people, every day, from all walks of life and many different age groups. Sudoku Improves your memory. Memory and logic work side-by-side when you are playing Sudoku. Stimulates your mind it also helps your brain work harder reducing anxiety. Reduces the chances of developing Alzheimer's by keeping your brain active. Sudoku Increases your concentration power. Creates a feeling of accomplishment and completion because of the sense of mental stimulation that comes from solving Sudoku puzzles helps you focus, allowing you to tune out the world. can and will lead to a lifelong hobby as it does not have any age limit. It is one of the simplest activities to learn and enjoy, and you can go on to do even more complex puzzles. Everybody can play the game - the kids, the adults, and the elderly. The puzzles calm you down. They give you a much-needed break from the daily chores. Many people make Sudoku a part of their daily schedule because it refreshes them and allows them to meet the other commitments with renewed energy and vigor. You can play Sudoku during moments of downtime during the day, during your lunch break, or first thing in the morning with your breakfast coffee. If you commute by train or bus, you can play Sudoku on your way to work, blocking out all noise by concentrating on your Sudoku puzzles. You don't need to be a numbers person at all. There's no math in sudoku. Sudoku is a game of logic, problem-solving, and spotting patterns - it's a real "brain game" that helps stimulate people's cognitive abilities and gives the satisfaction of accomplishing a challenging puzzle. Like physical exercise, your mind needs exercise too. Playing sudoku will exercise your brain extensively. Sudoku does not require any knowledge beforehand -- it's not like a crossword where you must know trivia. Just like physical exercise, your mind needs some exercise too. Playing sudoku exercises your brain extensively. By playing Sudoku more often, you can solve the puzzle faster and eventually advance to a harder level. Sudoku will help improve logical reasoning as you will find solving questions, especially those related to numbers are much easier than they were before you started solving sudoku. Sudoku will help you improve concentration. When you solve a sudoku puzzle, you won't get distracted by whatever is happening around you. Many sudoku puzzles solvers have told us that they used to find time to do sudoku puzzles now they make time to do these fun, totally engrossing and rewarding puzzles. Brand New Sudoku Easy To Very Hard. Random Games Of Sudoku. Brand New Sudoku Book With Never Before Seen Puzzles. SUDOKU IS JUST PLAIN FUN MAKES A GREAT GIFT: For the sudoku puzzle lover, this book makes a great gift for any occasion! Birthday, stocking suffers, road trip or more, everyone will love it! Sudoku Very Hard. Difficult, Evil, Genius Level

Book Enter the Ninja Sudoku

Download or read book Enter the Ninja Sudoku written by Frank Longo and published by Sterling Publishing Company. This book was released on 2007-03 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sudoku is the martial art of puzzles. This book presents a collection of energetic enigmas and numerical conundrums. It is suitable for solvers on the go and for anyone and everyone.

Book Ninja Sudoku

    Book Details:
  • Author : Mindful Puzzle Books
  • Publisher :
  • Release : 2019-10-09
  • ISBN : 9781698805269
  • Pages : 128 pages

Download or read book Ninja Sudoku written by Mindful Puzzle Books and published by . This book was released on 2019-10-09 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enter numbers 1-9 in such a way that Rows, Columns, Squares/Boxes and Outlined Regions contains each number exactly once on all Sudoku Boards.- There are 5 overlapping Sudoku Boards.- Variants include: Ninjutsudoku.- Numbers may not be duplicated on the gray lines.

Book Ultimate Ninja Sudoku

Download or read book Ultimate Ninja Sudoku written by Frank Longo and published by Sterling Publishing Company. This book was released on 2007-03 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Swordfish, the Gordonian Polygon, Alternating Digits, and Jellyfish make these sudoku super-hard!

Book Master Ninja Sudoku

Download or read book Master Ninja Sudoku written by Frank Longo and published by Sterling Publishing Company. This book was released on 2007-03 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Puzzles for the masters, featuring an array of Gordonian Rectangles.

Book Revenge of the Ninja Sudoku

Download or read book Revenge of the Ninja Sudoku written by Frank Longo and published by Sterling Publishing Company. This book was released on 2007-03 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bring a new skill to the fighting repertoire: interaction.

Book Puzzle Ninja

    Book Details:
  • Author : Alex Bellos
  • Publisher : Chronicle Books
  • Release : 2018-07-10
  • ISBN : 9781452171050
  • Pages : 0 pages

Download or read book Puzzle Ninja written by Alex Bellos and published by Chronicle Books. This book was released on 2018-07-10 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In his travels to Japan, author Alex Bellos set out to uncover the world's brightest puzzle inventors, puzzle masters, and origami experts so he could bring a new batch of logic puzzles for anyone hankering for something beyond Sudoku. In Puzzle Ninja he presents more than 200 puzzles to solve—rated easy to excruciating—including 20 new types of original, hand-crafted puzzles, like Shakashaka and Marupeke. With clear instructions, helpful tips, and anecdotes about the puzzles and their creators, this is an entertaining read and an exciting collection of the newest, best, and most addictive Japanese logic puzzles.

Book Sudoku for Ninjas BOOK 6

    Book Details:
  • Author : The Masters
  • Publisher :
  • Release : 2019-12-31
  • ISBN : 9781653562305
  • Pages : 111 pages

Download or read book Sudoku for Ninjas BOOK 6 written by The Masters and published by . This book was released on 2019-12-31 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sudoku Very Hard. Difficult, Evil, Genius Level Sudoku. Blackbelt, Ninja Level Sudoku. Brand New Sudoku Book With Never Before Seen Puzzles. 300 Very Difficult problems with their solutions Sudoku has rapidly become the world's most popular numbers game. It's played by millions of people, every day, from all walks of life and many different age groups. Sudoku Improves your memory. Memory and logic work side-by-side when you are playing Sudoku. Stimulates your mind it also helps your brain work harder reducing anxiety. Reduces the chances of developing Alzheimer's by keeping your brain active. Sudoku Increases your concentration power. Creates a feeling of accomplishment and completion because of the sense of mental stimulation that comes from solving Sudoku puzzles helps you focus, allowing you to tune out the world. can and will lead to a lifelong hobby as it does not have any age limit. It is one of the simplest activities to learn and enjoy, and you can go on to do even more complex puzzles. Everybody can play the game - the kids, the adults, and the elderly. The puzzles calm you down. They give you a much-needed break from the daily chores. Many people make Sudoku a part of their daily schedule because it refreshes them and allows them to meet the other commitments with renewed energy and vigor. You can play Sudoku during moments of downtime during the day, during your lunch break, or first thing in the morning with your breakfast coffee. If you commute by train or bus, you can play Sudoku on your way to work, blocking out all noise by concentrating on your Sudoku puzzles. You don't need to be a numbers person at all. There's no math in sudoku. Sudoku is a game of logic, problem-solving, and spotting patterns - it's a real "brain game" that helps stimulate people's cognitive abilities and gives the satisfaction of accomplishing a challenging puzzle. Like physical exercise, your mind needs exercise too. Playing sudoku will exercise your brain extensively. Sudoku does not require any knowledge beforehand -- it's not like a crossword where you must know trivia. Just like physical exercise, your mind needs some exercise too. Playing sudoku exercises your brain extensively. By playing Sudoku more often, you can solve the puzzle faster and eventually advance to a harder level. Sudoku will help improve logical reasoning as you will find solving questions, especially those related to numbers are much easier than they were before you started solving sudoku. Sudoku will help you improve concentration. When you solve a sudoku puzzle, you won't get distracted by whatever is happening around you. Many sudoku puzzles solvers have told us that they used to find time to do sudoku puzzles now they make time to do these fun, totally engrossing and rewarding puzzles. Brand New Sudoku Easy To Very Hard. Random Games Of Sudoku. Brand New Sudoku Book With Never Before Seen Puzzles. SUDOKU IS JUST PLAIN FUN MAKES A GREAT GIFT: For the sudoku puzzle lover, this book makes a great gift for any occasion! Birthday, stocking suffers, road trip or more, everyone will love it! Sudoku Very Hard. Difficult, Evil, Genius Level

Book The Big Book of Sudoku Red

Download or read book The Big Book of Sudoku Red written by Parragon Books and published by Parragon Books. This book was released on 2018-09-18 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: You don't need to be a math whiz to enjoy a great sudoku puzzle! Sharpen your mind and have some fun with this great collection of sudokus, including over 540 challenges across four difficulty levels (Warm-Up, Challenging, Tough, and the ultimate Samurai Sudoku!) A must-have for all Sudoku enthusiasts. OVER 500 PUZZLES & SOLUTIONS: Hours of fun and entertainment to enjoy! VARIETY OF LEVELS: From levels 1 to 3 increasing levels of difficulty including Warm Up, Challenging and Tough. When you are done, test your skills on the ultimate Samurai Sudoku Puzzle - 5 puzzles linked together by a central puzzle! Can you become a master samurai? LAY FLAT: Spiral-bound lays flat for ease of use at home or on the go. Whether your drinking your morning coffee, riding on the train or relaxing on vacation this sudoku book can go with you. MAKES A GREAT GIFT: For the sudoku puzzle lover, this books makes a great gift for any occasion! Birthday, stocking suffers, road trip or more, everyone will love it! BRAIN BUSTERS(TM) Part of the Brain Busters Puzzle Collection from Parragon & Cottage Door Press. Look for other books including word finds, crosswords, picture puzzles, and more.

Book Sudoku Puzzles for Ninja Kids Vol  1

Download or read book Sudoku Puzzles for Ninja Kids Vol 1 written by and published by . This book was released on 2020-05-22 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sudoku Puzzles for Ninja Kids with a Helpful Guide for Beginner Sudoku Puzzlers This puzzle book is perfect for introducing children to the challenges and pleasures of sudoku and logic puzzles. The series was designed for elementary school kids, but is great for beginners of all ages! Children as young as 5 are able to solve the 4 x 4 grid sudoku puzzles. Includes a comprehensive 10-page step-by-step "How to play sudoku" section to help beginner sudoku puzzlers Puzzles increase in difficulty from simple 4 x 4 grids, to 6 x 6 grids, and finally full-sized 9 x 9 traditional grids. Total of 150 age-appropriate puzzles Pictures of boy and girl ninjas and ninja stars (shuriken) to color in All solutions at the back of the book Composition notebook size so it will easily fit into a child's backpack Many kids are intrigued with these number puzzles, especially if they have seen parents or grandparents engrossed in their own sudoku puzzle books. It's an activity the whole family can do together, or separately. This book will allow you to do sudoku together, without interruptions or little hands wanting to "help" you with your own sudoku puzzles! SUDOKU PUZZLES... improve memory develop deductive reasoning and critical thinking skills boost concentration levels teach attention to detail develop problem-solving skills provide decision-making practice are relaxing and can help to reduce anxiety - there's an almost meditative quality to sudoku help children to spot patterns and opportunities build confidence in children's numerical ability - they are so proud when they work out challenging puzzles by themselves can be an enjoyable lifelong hobby are a fun activity to share with family and friends give immense satisfaction on completion - this is true for kids just as much as it is for adults! FORMAT IN MORE DETAIL The introductory 4 x 4 puzzles help kids grasp the concept of rows and columns, sub-grids etc. when trying to figure out what number goes where. Immediate success is important so that kids are motivated to keep going. Beginners will practice the strategies taught at the start of the book, build up both their skills and patience as they go from the simplest sudoku to 6 x 6 grids, to eventually be able to tackle the classic 9 x 9 puzzles. WHO IS THIS PUZZLE BOOK FOR? budding mathematicians kids who would benefit from building their confidence around numbers mental exercise for seniors those who have suffered strokes, to help with memory speech language pathologists often recommend sudoku to their patients sudoku lovers who want to recruit others into the puzzle world! kids (and adults!) in need of some entertainment without resorting to screens - think rainy days, in waiting rooms, and while traveling (planes, trains, and road trips)... WARNING: this puzzle book may lead to an addiction to sudoku and challenging logic puzzles!

Book Ninja Life Hacks  Angry Ninja Activity Book

Download or read book Ninja Life Hacks Angry Ninja Activity Book written by Mary Nhin and published by Simon and Schuster. This book was released on 2022-04-12 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Angry Ninja deals with BIG emotions in this mindful activity book filled with creative ways to for kids to manage negative feelings. Life is tough! But so are the kids trying to figure out their emotions and complex feelings. Ninja Life Hacks: Angry Ninja Activity Book takes one of the most popular characters from the bestselling book series and puts them in a fun activity book to help relax and release their daily stresses. Guided by Angry Ninja, kids can learn simple strategies for dealing with difficult emotions by doing engaging, fun and effective activities. 75+ MINDFUL ACTIVITIES: Dozens of detailed pages offer thought-provoking activities to guide your child toward a positive mindset. INSPIRING CHARACTER: Kids learn and grow along with Angry Ninja, developing skills and strategies for managing emotions. LAUGHING WHILE LEARNING: Filled with the signature humor of the bestselling Ninja Life Hacks books, these activities are as entertaining as they are enlightening. COLLECT THEM ALL: Extend the learning fun with Ninja Life Hacks: Positive Ninja Activity Book, Let’s Talk: Conversation Cards. and Meet the Ninjas: The Ultimate Ninja Guide to Life.

Book Sudoku for Ninjas BOOK 4

    Book Details:
  • Author : The Masters
  • Publisher :
  • Release : 2019-12-31
  • ISBN : 9781653512577
  • Pages : 111 pages

Download or read book Sudoku for Ninjas BOOK 4 written by The Masters and published by . This book was released on 2019-12-31 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sudoku Very Hard. Difficult, Evil, Genius Level Sudoku. Blackbelt, Ninja Level Sudoku. Brand New Sudoku Book With Never Before Seen Puzzles. 300 Very Difficult problems with their solutions Sudoku has rapidly become the world's most popular numbers game. It's played by millions of people, every day, from all walks of life and many different age groups. Sudoku Improves your memory. Memory and logic work side-by-side when you are playing Sudoku. Stimulates your mind it also helps your brain work harder reducing anxiety. Reduces the chances of developing Alzheimer's by keeping your brain active. Sudoku Increases your concentration power. Creates a feeling of accomplishment and completion because of the sense of mental stimulation that comes from solving Sudoku puzzles helps you focus, allowing you to tune out the world. can and will lead to a lifelong hobby as it does not have any age limit. It is one of the simplest activities to learn and enjoy, and you can go on to do even more complex puzzles. Everybody can play the game - the kids, the adults, and the elderly. The puzzles calm you down. They give you a much-needed break from the daily chores. Many people make Sudoku a part of their daily schedule because it refreshes them and allows them to meet the other commitments with renewed energy and vigor. You can play Sudoku during moments of downtime during the day, during your lunch break, or first thing in the morning with your breakfast coffee. If you commute by train or bus, you can play Sudoku on your way to work, blocking out all noise by concentrating on your Sudoku puzzles. You don't need to be a numbers person at all. There's no math in sudoku. Sudoku is a game of logic, problem-solving, and spotting patterns - it's a real "brain game" that helps stimulate people's cognitive abilities and gives the satisfaction of accomplishing a challenging puzzle. Like physical exercise, your mind needs exercise too. Playing sudoku will exercise your brain extensively. Sudoku does not require any knowledge beforehand -- it's not like a crossword where you must know trivia. Just like physical exercise, your mind needs some exercise too. Playing sudoku exercises your brain extensively. By playing Sudoku more often, you can solve the puzzle faster and eventually advance to a harder level. Sudoku will help improve logical reasoning as you will find solving questions, especially those related to numbers are much easier than they were before you started solving sudoku. Sudoku will help you improve concentration. When you solve a sudoku puzzle, you won't get distracted by whatever is happening around you. Many sudoku puzzles solvers have told us that they used to find time to do sudoku puzzles now they make time to do these fun, totally engrossing and rewarding puzzles. Brand New Sudoku Easy To Very Hard. Random Games Of Sudoku. Brand New Sudoku Book With Never Before Seen Puzzles. SUDOKU IS JUST PLAIN FUN MAKES A GREAT GIFT: For the sudoku puzzle lover, this book makes a great gift for any occasion! Birthday, stocking suffers, road trip or more, everyone will love it! Sudoku Very Hard. Difficult, Evil, Genius Level

Book Ninja Life Hacks  Growth Mindset Ninja Activity Book

Download or read book Ninja Life Hacks Growth Mindset Ninja Activity Book written by Mary Nhin and published by Simon and Schuster. This book was released on 2022-10-04 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Growth Mindset Ninja aims high in this mindful interactive book filled with creative activities, games, and strategies that help kids grow their brains! Life is tough! But so are the kids trying to figure out their BIG emotions and complicated feelings. Growth Mindset Ninja Activity Book features one of the most popular characters from the bestselling book series Ninja Life Hacks in a fun activity book that helps kids learn and grow. Guided by Growth Mindset Ninja, kids can learn simple strategies to grow their brains by using the power of “yet” with tons of engaging, fun, and effective activities. 75+ MINDFUL ACTIVITIES: Dozens of detailed pages offer thought-provoking activities to guide kids toward a growth mindset. INSPIRING CHARACTER: Kids learn and grow along with Growth Mindset Ninja, developing skills and strategies for managing emotions and harnessing the power of “yet.” LAUGHING WHILE LEARNING: Filled with the signature humor of the bestselling Ninja Life Hacks books, these activities are as entertaining as they are enlightening. COLLECT THEM ALL: Extend the learning fun with additional activity books in the series: Positive Ninja Activity Book, Angry Ninja Activity Book, Anxious Ninja Activity Book, Kind Ninja Activity Book, and Calm Ninja Activity Book.

Book Ninja Life Hacks  Kind Ninja Activity Book

Download or read book Ninja Life Hacks Kind Ninja Activity Book written by Mary Nhin and published by Simon and Schuster. This book was released on 2022-06-14 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kids learn how kindness and caring can make the world a better place in this mindful activity book. Kindness and concern for others are held as moral virtues in nearly every society and every major religion. In this awesome activity book, Kind Ninja introduces mindful activities and inspirational lessons that will teach kids about the impact kindness can have on friends, family, and the world overall. Kids will be entertained for hours with their favorite ninja friend while they learn tips and tools to spread kindness and show care for others. 75+ MINDFUL ACTIVITIES: Dozens of colorful pages offer thought-provoking activities to guide kids toward kindness. MORE MOMENTS TO SHARE: Expands on the bestselling book Kind Ninja with new prompts and activities that kids (and their parents) have been waiting for. RAISING KIND KIDS: Ninety percent of parents say their top priority is teaching their kids to be kind and show concern for others. This activity book offers an engaging way to expand on the story of Kind Ninja and their positive behaviors. INSPIRATIONAL CHARACTER: With activity prompts inspired by the lessons Kind Ninja has learned, kids can interact with their favorite character in a whole new way. COLLECT THEM ALL: Extend the learning fun with Angry Ninja Activity Book, Positive Ninja Activity Book, Anxious Ninja Activity Book, Let’s Talk: Conversation Cards, and Meet the Ninjas: The Ultimate Ninja Guide to Life.

Book Sudoku for Ninjas BOOK 3

    Book Details:
  • Author : The Masters
  • Publisher :
  • Release : 2019-12-31
  • ISBN : 9781653501793
  • Pages : 111 pages

Download or read book Sudoku for Ninjas BOOK 3 written by The Masters and published by . This book was released on 2019-12-31 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sudoku Very Hard. Difficult, Evil, Genius Level Sudoku. Blackbelt, Ninja Level Sudoku. Brand New Sudoku Book With Never Before Seen Puzzles. 300 Very Difficult problems with their solutions Sudoku has rapidly become the world's most popular numbers game. It's played by millions of people, every day, from all walks of life and many different age groups. Sudoku Improves your memory. Memory and logic work side-by-side when you are playing Sudoku. Stimulates your mind it also helps your brain work harder reducing anxiety. Reduces the chances of developing Alzheimer's by keeping your brain active. Sudoku Increases your concentration power. Creates a feeling of accomplishment and completion because of the sense of mental stimulation that comes from solving Sudoku puzzles helps you focus, allowing you to tune out the world. can and will lead to a lifelong hobby as it does not have any age limit. It is one of the simplest activities to learn and enjoy, and you can go on to do even more complex puzzles. Everybody can play the game - the kids, the adults, and the elderly. The puzzles calm you down. They give you a much-needed break from the daily chores. Many people make Sudoku a part of their daily schedule because it refreshes them and allows them to meet the other commitments with renewed energy and vigor. You can play Sudoku during moments of downtime during the day, during your lunch break, or first thing in the morning with your breakfast coffee. If you commute by train or bus, you can play Sudoku on your way to work, blocking out all noise by concentrating on your Sudoku puzzles. You don't need to be a numbers person at all. There's no math in sudoku. Sudoku is a game of logic, problem-solving, and spotting patterns - it's a real "brain game" that helps stimulate people's cognitive abilities and gives the satisfaction of accomplishing a challenging puzzle. Like physical exercise, your mind needs exercise too. Playing sudoku will exercise your brain extensively. Sudoku does not require any knowledge beforehand -- it's not like a crossword where you must know trivia. Just like physical exercise, your mind needs some exercise too. Playing sudoku exercises your brain extensively. By playing Sudoku more often, you can solve the puzzle faster and eventually advance to a harder level. Sudoku will help improve logical reasoning as you will find solving questions, especially those related to numbers are much easier than they were before you started solving sudoku. Sudoku will help you improve concentration. When you solve a sudoku puzzle, you won't get distracted by whatever is happening around you. Many sudoku puzzles solvers have told us that they used to find time to do sudoku puzzles now they make time to do these fun, totally engrossing and rewarding puzzles. Brand New Sudoku Easy To Very Hard. Random Games Of Sudoku. Brand New Sudoku Book With Never Before Seen Puzzles. SUDOKU IS JUST PLAIN FUN MAKES A GREAT GIFT: For the sudoku puzzle lover, this book makes a great gift for any occasion! Birthday, stocking suffers, road trip or more, everyone will love it! Sudoku Very Hard. Difficult, Evil, Genius Level

Book Mega Sudoku Challenge for Kids

Download or read book Mega Sudoku Challenge for Kids written by Extreme Puzzles and published by . This book was released on 2020-01-08 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amazing Puzzles Suitable for kids of all levels: beginner to expert Designed for kids to challenge all skill levels Each Sudoku has only ONE solution Part of the 5 book Ninja Extreme Puzzle Challenge Series Easy to cut it or tear out These puzzles are exclusive and Unique, this means they will never appear in any other book of the series again. Small size so your kid can fit the book in the jacket, bag of anywhere else 200 additional puzzles for your kid when he/she completes the book. Just follow the book instructions to receive the free puzzles by email Add it to your shopping cart and start the Ninja Challenge

Book Sudoku Ninja For Kids

    Book Details:
  • Author : Puzzle Ninja
  • Publisher :
  • Release : 2020-07-12
  • ISBN :
  • Pages : 58 pages

Download or read book Sudoku Ninja For Kids written by Puzzle Ninja and published by . This book was released on 2020-07-12 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Become a Sudoko NInja, Gain the mental speed and alertness of a Ninja as you work your way up the ranks and finally achieve the supreme rank of Master Ninja.Sudoku puzzles to stretch your brain cells, bring you frustration, and provide you with a great sense of achievement. Enjoy the Beginner level...Hira Level and then work your way up the Ninja Ranks. There is one book for each level