Download or read book The Sudoku Book For Hard Thinkers 15 written by Masaki Hoshiko and published by Bluesource and Friends. This book was released on 2019-10-16 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: 9 Out Of 10 Sudoku Enthusiasts Have Failed To Solve Our Sudoku Puzzles. Are You Up To The Challenge? Are you sick and tired of all those boring newspaper-grade Sudoku puzzles? Do you want to test your puzzle-solving skills and take on the hardest Sudoku puzzles out there? Do you want to spend endless hours sharpening your logic skills and giving your brain a workout? Discover The Hardest Sudoku Puzzle Book By Masaki Hoshiko! When it comes to boosting your focus, concentration and mental skills, Sudoku puzzles are exactly what you need. But just like all other puzzles, you need to find a real challenge that will push you to your limits and make the taste of solving the puzzle so much sweeter. Attention! This Sudoku Puzzle Book Is NOT FOR EVERYONE! Here are the requirements to even pick up our Sudoku puzzle book: 100+ Broken Pencils if you have snapped hundreds of pencils in half trying to find a number that solves the puzzles, then you are welcome. "Last Puzzle For Today" if you have uttered this phrase more than 100+ times and lied to yourself every single time, then you are ready to start solving our puzzles. Sudoku Dreams if every time you close your eyes, all you can see is 9 rows, 9 columns and 81 cells, then you are our ideal candidate. What's In It For You? 6 Reasons To Start Solving Our Puzzles Right Away: Spoil Yourself With The Most Challenging Sudoku Puzzles You Have Seen Uncover A Whole New World Of Hard Sudoku Puzzles In An All-In-One Book Do Not Settle For All Those Childish Sudoku Puzzle Books Open The Door To A Challenge Worthy Of Your Skills Keep Your Brain Engaged & Entertained For Hours On End Unleash Your Inner Sudoku Master Today Do You Know Someone Who Could Use The Challenge? Surprise your wife, husband, boyfriend, girlfriend, father, mother, sister, brother, grandparents or grandkids with our must-have Sudoku puzzle book! Click "Buy Now" & Embark On Your Newest Sudoku Adventure!

Download or read book Hard Sudoku Book For Teenagers 15 written by Masaki Hoshiko and published by Bluesource and Friends. This book was released on 2019-10-16 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: 9 Out Of 10 Sudoku Enthusiasts Have Failed To Solve Our Sudoku Puzzles. Are You Up To The Challenge? Are you sick and tired of all those boring newspaper-grade Sudoku puzzles? Do you want to test your puzzle-solving skills and take on the hardest Sudoku puzzles out there? Do you want to spend endless hours sharpening your logic skills and giving your brain a workout? Discover The Hardest Sudoku Puzzle Book By Masaki Hoshiko! When it comes to boosting your focus, concentration and mental skills, Sudoku puzzles are exactly what you need. But just like all other puzzles, you need to find a real challenge that will push you to your limits and make the taste of solving the puzzle so much sweeter. Attention! This Sudoku Puzzle Book Is NOT FOR EVERYONE! Here are the requirements to even pick up our Sudoku puzzle book: 100+ Broken Pencils if you have snapped hundreds of pencils in half trying to find a number that solves the puzzles, then you are welcome. "Last Puzzle For Today" if you have uttered this phrase more than 100+ times and lied to yourself every single time, then you are ready to start solving our puzzles. Sudoku Dreams if every time you close your eyes, all you can see is 9 rows, 9 columns and 81 cells, then you are our ideal candidate. What's In It For You? 6 Reasons To Start Solving Our Puzzles Right Away: Spoil Yourself With The Most Challenging Sudoku Puzzles You Have Seen Uncover A Whole New World Of Hard Sudoku Puzzles In An All-In-One Book Do Not Settle For All Those Childish Sudoku Puzzle Books Open The Door To A Challenge Worthy Of Your Skills Keep Your Brain Engaged & Entertained For Hours On End Unleash Your Inner Sudoku Master Today Do You Know Someone Who Could Use The Challenge? Surprise your wife, husband, boyfriend, girlfriend, father, mother, sister, brother, grandparents or grandkids with our must-have Sudoku puzzle book! Click "Buy Now" & Embark On Your Newest Sudoku Adventure!

Download or read book The Sudoku Book For Hard Thinkers written by Masaki Hoshiko and published by Independently Published. This book was released on 2019-04-17 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: 9 Out Of 10 Sudoku Enthusiasts Have Failed To Solve Our Sudoku Puzzles. Are You Up To The Challenge? Are you sick and tired of all those boring newspaper-grade Sudoku puzzles? Do you want to test your puzzle-solving skills and take on the hardest Sudoku puzzles out there? Do you want to spend endless hours sharpening your logic skills and giving your brain a workout? Discover The Hardest Sudoku Puzzle Book By Masaki Hoshiko! When it comes to boosting your focus, concentration and mental skills, Sudoku puzzles are exactly what you need. But just like all other puzzles, you need to find a real challenge that will push you to your limits and make the taste of solving the puzzle so much sweeter. Attention! This Sudoku Puzzle Book Is NOT FOR EVERYONE! Here are the requirements to even pick up our Sudoku puzzle book: 100+ Broken Pencils: if you have snapped hundreds of pencils in half trying to find a number that solves the puzzles, then you are welcome. "Last Puzzle For Today": if you have uttered this phrase more than 100+ times and lied to yourself every single time, then you are ready to start solving our puzzles. Sudoku Dreams: if every time you close your eyes, all you can see is 9 rows, 9 columns and 81 cells, then you are our ideal candidate. What's In It For You? 6 Reasons To Start Solving Our Puzzles Right Away: Spoil Yourself With The Most Challenging Sudoku Puzzles You Have Seen Uncover A Whole New World Of Hard Sudoku Puzzles In An All-In-One Book Do Not Settle For All Those Childish Sudoku Puzzle Books Open The Door To A Challenge Worthy Of Your Skills Keep Your Brain Engaged & Entertained For Hours On End Unleash Your Inner Sudoku Master Today Do You Know Someone Who Could Use The Challenge? Surprise your wife, husband, boyfriend, girlfriend, father, mother, sister, brother, grandparents or grandkids with our must-have Sudoku puzzle book! Click "Buy Now" & Embark On Your Newest Sudoku Adventure!

Download or read book The Hard Sudoku Code 15 written by Masaki Hoshiko and published by Bluesource and Friends. This book was released on 2019-10-16 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: 9 Out Of 10 Sudoku Enthusiasts Have Failed To Solve Our Sudoku Puzzles. Are You Up To The Challenge? Are you sick and tired of all those boring newspaper-grade Sudoku puzzles? Do you want to test your puzzle-solving skills and take on the hardest Sudoku puzzles out there? Do you want to spend endless hours sharpening your logic skills and giving your brain a workout? Discover The Hardest Sudoku Puzzle Book By Masaki Hoshiko! When it comes to boosting your focus, concentration and mental skills, Sudoku puzzles are exactly what you need. But just like all other puzzles, you need to find a real challenge that will push you to your limits and make the taste of solving the puzzle so much sweeter. Attention! This Sudoku Puzzle Book Is NOT FOR EVERYONE! Here are the requirements to even pick up our Sudoku puzzle book: 100+ Broken Pencils if you have snapped hundreds of pencils in half trying to find a number that solves the puzzles, then you are welcome. "Last Puzzle For Today" if you have uttered this phrase more than 100+ times and lied to yourself every single time, then you are ready to start solving our puzzles. Sudoku Dreams if every time you close your eyes, all you can see is 9 rows, 9 columns and 81 cells, then you are our ideal candidate. What's In It For You? 6 Reasons To Start Solving Our Puzzles Right Away: Spoil Yourself With The Most Challenging Sudoku Puzzles You Have Seen Uncover A Whole New World Of Hard Sudoku Puzzles In An All-In-One Book Do Not Settle For All Those Childish Sudoku Puzzle Books Open The Door To A Challenge Worthy Of Your Skills Keep Your Brain Engaged & Entertained For Hours On End Unleash Your Inner Sudoku Master Today Do You Know Someone Who Could Use The Challenge? Surprise your wife, husband, boyfriend, girlfriend, father, mother, sister, brother, grandparents or grandkids with our must-have Sudoku puzzle book! Click "Buy Now" & Embark On Your Newest Sudoku Adventure!

Download or read book Brain Training Sudoku Puzzles 15 written by Masaki Hoshiko and published by Bluesource and Friends. This book was released on 2019-10-16 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: 9 Out Of 10 Sudoku Enthusiasts Have Failed To Solve Our Sudoku Puzzles. Are You Up To The Challenge? Are you sick and tired of all those boring newspaper-grade Sudoku puzzles? Do you want to test your puzzle-solving skills and take on the hardest Sudoku puzzles out there? Do you want to spend endless hours sharpening your logic skills and giving your brain a workout? Discover The Hardest Sudoku Puzzle Book By Masaki Hoshiko! When it comes to boosting your focus, concentration and mental skills, Sudoku puzzles are exactly what you need. But just like all other puzzles, you need to find a real challenge that will push you to your limits and make the taste of solving the puzzle so much sweeter. Attention! This Sudoku Puzzle Book Is NOT FOR EVERYONE! Here are the requirements to even pick up our Sudoku puzzle book: 100+ Broken Pencils if you have snapped hundreds of pencils in half trying to find a number that solves the puzzles, then you are welcome. "Last Puzzle For Today" if you have uttered this phrase more than 100+ times and lied to yourself every single time, then you are ready to start solving our puzzles. Sudoku Dreams if every time you close your eyes, all you can see is 9 rows, 9 columns and 81 cells, then you are our ideal candidate. What's In It For You? 6 Reasons To Start Solving Our Puzzles Right Away: Spoil Yourself With The Most Challenging Sudoku Puzzles You Have Seen Uncover A Whole New World Of Hard Sudoku Puzzles In An All-In-One Book Do Not Settle For All Those Childish Sudoku Puzzle Books Open The Door To A Challenge Worthy Of Your Skills Keep Your Brain Engaged & Entertained For Hours On End Unleash Your Inner Sudoku Master Today Do You Know Someone Who Could Use The Challenge? Surprise your wife, husband, boyfriend, girlfriend, father, mother, sister, brother, grandparents or grandkids with our must-have Sudoku puzzle book! Click "Buy Now" & Embark On Your Newest Sudoku Adventure!

Download or read book Advanced Sudoku Puzzle Book For Seniors 15 written by Masaki Hoshiko and published by Bluesource and Friends. This book was released on 2019-10-16 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: 9 Out Of 10 Sudoku Enthusiasts Have Failed To Solve Our Sudoku Puzzles. Are You Up To The Challenge? Are you sick and tired of all those boring newspaper-grade Sudoku puzzles? Do you want to test your puzzle-solving skills and take on the hardest Sudoku puzzles out there? Do you want to spend endless hours sharpening your logic skills and giving your brain a workout? Discover The Hardest Sudoku Puzzle Book By Masaki Hoshiko! When it comes to boosting your focus, concentration and mental skills, Sudoku puzzles are exactly what you need. But just like all other puzzles, you need to find a real challenge that will push you to your limits and make the taste of solving the puzzle so much sweeter. Attention! This Sudoku Puzzle Book Is NOT FOR EVERYONE! Here are the requirements to even pick up our Sudoku puzzle book: 100+ Broken Pencils if you have snapped hundreds of pencils in half trying to find a number that solves the puzzles, then you are welcome. "Last Puzzle For Today" if you have uttered this phrase more than 100+ times and lied to yourself every single time, then you are ready to start solving our puzzles. Sudoku Dreams if every time you close your eyes, all you can see is 9 rows, 9 columns and 81 cells, then you are our ideal candidate. What's In It For You? 6 Reasons To Start Solving Our Puzzles Right Away: Spoil Yourself With The Most Challenging Sudoku Puzzles You Have Seen Uncover A Whole New World Of Hard Sudoku Puzzles In An All-In-One Book Do Not Settle For All Those Childish Sudoku Puzzle Books Open The Door To A Challenge Worthy Of Your Skills Keep Your Brain Engaged & Entertained For Hours On End Unleash Your Inner Sudoku Master Today Do You Know Someone Who Could Use The Challenge? Surprise your wife, husband, boyfriend, girlfriend, father, mother, sister, brother, grandparents or grandkids with our must-have Sudoku puzzle book! Click "Buy Now" & Embark On Your Newest Sudoku Adventure!

Download or read book Sudoku written by Arbëresh Dalipi and published by Createspace Independent Publishing Platform. This book was released on 2017-09-16 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increase the effectiveness of your brain function with Sudoku puzzles.What if you could reduce your chances of Dementia or Alzheimer's disease by solving Sudoku puzzles? According to the University of Edinburgh, UK, research has found that Sudoku can trigger "survival genes" in the brain that normally lay dormant. Arbëresh Dalipi has been compiling and publishing puzzles for over two decades. By using his collection of sudoku books you will experience improved brain functions such as concentration, logical thinking and memory. Pick up your copy today by clicking on the BUY NOW button at the top of this page.

Download or read book My Sudoku Puzzle Book written by Judge J and published by Createspace Independent Publishing Platform. This book was released on 2016-05-28 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: If you like to solve puzzles and have never played Sudoku, then you are in for a treat, you can start with the easy to do puzzles and advance your skills by moving onto the harder level books. If on the other hand you have experience with Sudoku, then picking up this HARDER LEVEL Sudoku Book will help you to hone and developed your talents. If this is not hard enough then try our VERY-HARD LEVEL Sudoku Book, it will really test your skills. Lots of people love to play Sudoku Puzzles, people of all ages, all nationalities, and from all walks of life. Sudoku Puzzles are very popular; they get published in newspapers and magazines across the globe, much like crossword puzzles. One thing you will discover about Sudoku Puzzles, they are very addictive and presses are working hard to turn out books to help satisfy that addiction. If you are anything like me, you will have a passion about solving Sudoku Puzzles, finding yourself completely absorbed by and spending hours solving as many puzzles as possible. Sudoku Puzzles can also grip whole families too. They are great for helping to elevate those long boring hours spent travelling, or occupy those times when you have spare time on your hands. The word "Sudoku" is a Japanese word that means "single number". Sudoku is a game, which involves patience, a lot of thinking, reflection, concentration, problem-solving, and careful decision-making. Please note: if you are new to Sudoku then you may find this book difficult, so try out the Easy Sudoku books first then progress from there... Now have lots of fun solving these fantastic unique Sudoku Puzzles...

Download or read book 105 Sudoku With Solution written by Brain Games Sudoku Puzzle Book and published by . This book was released on 2020-05-06 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Sudoku Book for Adults Easy to hard will bring many hours of fun and enjoyment for grown ups. Each puzzle comes with the solution in the back, just in case you are stuck and need a little help. Sudoku is not just a good game as a hobby and relax but also great to improve memory, critical thinking, logic and problem solving. That is why millions of men and women love solving Sudoku puzzles. It definitely also makes a great gift and birthday present. Get your Sudoku Book for Adults Easy to Medium today and start enjoying lots of fun!

Download or read book Classic Sudoku For Kids 9x9 Hard Volume 15 145 Logic Puzzles written by Nick Snels and published by PuzzleBooks.net. This book was released on 2016-09-22 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: When you buy this book you get an electronic version (PDF file) of the interior of this book. You can play the puzzles in this book on your mobile phone! Sudoku is a fun and addicting logic puzzle game. Sudoku is ideal to introduce your child to inequality signs and logical thinking. Sudoku teaches your child logical thinking and deductive reasoning skills, even at a young age. Sudoku improves critical thinking and making quick decisions based upon available evidence. Sudoku is a brain game that helps to train the brain of your child. In addition, Sudoku demands attention to detail - noticing patterns, spotting opportunities, and finding the right moment to make a move. Sudoku is not only fun and interesting – it might just help prepare your kids for better success in school and in life. Only 1 large print puzzle per page, with lots of white space for scribbling. Classic Sudoku For Kids 9x9 - Hard is a collection of 145 puzzle: 124 hard Sudoku 9x9 puzzle 21 extra logic puzzle I guarantee that every logic puzzle in this Sudoku puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzle in this book will appear in any of the other English PuzzleBooks.net books. Sudoku is also known as Number Place, Nanpure, Su Doku. Quite often Sudoku is misspelled as Suduko, Soduko, Sodoku, Sudoko, Suduku or Soduku.

Download or read book I m Llamazing Sudoku Puzzle Book For Kids 12 15 written by Samsu Press and published by . This book was released on 2020-04-27 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: SUDOKU PUZZLES BOOK FOR KIDS Sudoku Puzzles Activity Book For Kids: 300 Sudoku Puzzles Easy-Medium-Hard With Solution There are 4 puzzles per page and solutions are at the end of the book. Sudoku is one of the best ways for kids to improve their memory, increase concentration levels and have a lot of fun at the same time. If you're looking for a Sudoku book for beginners to advanced, here's the perfect first Sudoku puzzle book for you! All puzzle answers are included in the Last of the book. Teach your kids to develop critical thinking and logic skills with the addicting fun of Sudoku!

Download or read book 1000 Sudoku Puzzles Hard Volume 15 written by Aletha Sudoku Books and published by . This book was released on 2020-02-15 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: A huge supply of classic Sudoku Puzzles! Enjoy the most popular puzzle game in the world! whether you want to keep your brain young and active, develop logical thinking or just keep yourself busy to avoid boredom... this book will help you with its unique Sudoku Puzzle. Features: 1000 Sudoku Puzzles Hard and Solutions. Suitable for level: Professional Expertly crafted with accurate skill levels 6 Puzzle per page Bigger print than in most newspapers and magazines (and with better paper) 8.5 x 11 (inches) 21.59cm x 27.94cm Our skill levels are accurate (we worked hard at this)! Wide inner margins make it easy to tear out the puzzles for convenience Perfect as a gift for sudoku Pick up your copy today by clicking on the BUY NOW button at the top of this page.

Download or read book My Sudoku Puzzle Book written by Judge J and published by Createspace Independent Publishing Platform. This book was released on 2016-05-30 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: If you like to solve puzzles and have never played Sudoku, then you are in for a treat, you can start with the easy to do puzzles and advance your skills by moving onto the harder level books. If on the other hand you have experience with Sudoku, then you can pick a higher level book to hone and developed your talents. This Book Level is Very-HARD. Lots of people love to play Sudoku Puzzles, people of all ages, all nationalities, and from all walks of life. Sudoku Puzzles are very popular; they get published in newspapers and magazines across the globe, much like crossword puzzles. If on the other hand you have experience with Sudoku, then picking up this Very-Hard Level Sudoku Book will help you to hone and developed your talents. Whatever level you are at, one thing you will discover about Sudoku Puzzles, they are very addictive and presses are working hard to turn out books to help satisfy that addiction. If you are anything like me, you will have a passion about solving Sudoku Puzzles, finding yourself completely absorbed by and spending hours solving as many puzzles as possible. Sudoku Puzzles can also grip whole families too. They are great for helping to elevate those long boring hours spent travelling, or occupy those times when you have spare time on your hands. The word "Sudoku" is a Japanese word that means "single number." Sudoku is a game, which involves patience, a lot of thinking, reflection, concentration, problem-solving, and careful decision-making. Please note: if you are new to Sudoku then you will find this book too difficult, so try out the Easy or Medium Sudoku books first then progress from there... Now have lots of fun solving these fantastic unique Sudoku Puzzles...

Download or read book Sudoku Book for Clever Kids 500 Puzzles Medium to Hard written by Jennifer Glenda and published by . This book was released on 2020-04-16 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sudoku Book for Clever Kids - 500 Puzzles - Medium to Hard 500 Sudoku Puzzles for Childen 8 to 15 with Solutions Details about this sudoku book: Lots of sudoku puzzles: 500 Sudokus Expertly crafted with accurate skill levels Includes instructions, techniques and pro tips for beginners Answers for every sudoku included in back Easy to tear out, thanks to wide margins Size of the book: 8.5 X 11 Makes a great gift for birthday or other occasions. This Sudoku for Kids 8-15is specifically created for children. Included with this Sudoku book are solutions to every Sudoku as well as instructions and pro tips so any kid can learn how to play. Sudoku's will bring the kids hours of fun and entertainment all while improving their memory, critical thinking, logic and problem solving skills. Sudoku is great to have as an activity book for at home and while traveling. Let your kid join the millions of others around the world who are loving this puzzle game. It makes a great gift and birthday present. Get your Sudoku for Kids 8-15 today and start enjoying lots of fun!

Download or read book My Sudoku Puzzle Book written by Judge J and published by Createspace Independent Publishing Platform. This book was released on 2016-05-31 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: If you like to solve puzzles and have never played Sudoku, then you are in for a treat, you can start with the easy to do puzzles and advance your skills by moving onto the harder level books. If on the other hand you have some experience with Sudoku, then you can pick a higher level book to hone and developed your talents. This Book Level is MIXED, Easy, Medium, Hard, and Very - Hard. Lots of people love to play Sudoku Puzzles, people of all ages, all nationalities, and from all walks of life. Sudoku Puzzles are very popular; they get published in newspapers and magazines across the globe, much like crossword puzzles. If on the other hand you have experience with Sudoku, then picking up this MIXED LEVEL Sudoku Book will help you to hone and developed your talents. You will find some Very-Hard Sudoku levels in this book that will test your skills to the limits. Whatever level you are at, one thing you will discover about Sudoku Puzzles, they are very addictive and presses are working hard to turn out books to help satisfy that addiction. If you are anything like me, you will have a passion about solving Sudoku Puzzles, finding yourself completely absorbed by and spending hours solving as many puzzles as possible. Sudoku Puzzles can also grip whole families too. They are great for helping to elevate those long boring hours spent travelling, or occupy those times when you have spare time on your hands. They are great also for exercising and keeping your mind sharp. The word "Sudoku" is a Japanese word that means "single number". Sudoku is a game, which involves patience, a lot of thinking, reflection, concentration, problem-solving, and careful decision-making. Please note: if you are new to Sudoku then you may find this book difficult, so try out the Easy Sudoku books first then progress from there... Now have lots of fun solving these fantastic unique Sudoku Puzzles...

Download or read book Sudoku Book for Clever Kids 500 Puzzles Medium to Hard written by Jennifer Glenda and published by . This book was released on 2020-04-16 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sudoku Book for Clever Kids - 500 Puzzles - Medium to Hard 500 Sudoku Puzzles for Childen 8 to 15 with Solutions Details about this sudoku book: Lots of sudoku puzzles: 500 Sudokus Expertly crafted with accurate skill levels Includes instructions, techniques and pro tips for beginners Answers for every sudoku included in back Easy to tear out, thanks to wide margins Size of the book: 8.5 X 11 Makes a great gift for birthday or other occasions. This Sudoku for Kids 8-15is specifically created for children. Included with this Sudoku book are solutions to every Sudoku as well as instructions and pro tips so any kid can learn how to play. Sudoku's will bring the kids hours of fun and entertainment all while improving their memory, critical thinking, logic and problem solving skills. Sudoku is great to have as an activity book for at home and while traveling. Let your kid join the millions of others around the world who are loving this puzzle game. It makes a great gift and birthday present. Get your Sudoku for Kids 8-15 today and start enjoying lots of fun!

Download or read book Connoisseur of Puzzles Classic Sudoku 15 X 15 written by Andrii Pitenko and published by Createspace Independent Publishing Platform. This book was released on 2018-07-12 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: - 250 excellent puzzles + surprise in 250 killer sudoku very hard (need to download and print) - Sudoku 15x15, separated by smaller rectangles of 5x3 cells. It is necessary to fill empty cells with numbers from 1 to 15, each of the digits should appear only once in each line of the 15x15 square, 15x15 column and 5x3 rectangle - levels continue to please. 50 Easy + 50 Medium + 50 Hard + 100 Very hard - all riddles have only one verified solution - 2 puzzles on 1 page, very practical and convenient - a lot of free space for the progress of your thoughts - good mind support in excellent form - large font - develops memory, logical thinking, helps to focus - creative possibilities are expanding Ideal gift for all fans of puzzles. An excellent book for free time and learning of the mind. I hope you enjoy the book. I would be very grateful if you write a review. Best regards, Andrii Pitenko