World's Hardest Sudoku Book

Download World's Hardest Sudoku Book PDF Online Free

Author :
Publisher : Independently Published
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.3/5 (71 download)

DOWNLOAD NOW!


Book Synopsis World's Hardest Sudoku Book by : Guy Rinzema

Download or read book World's Hardest Sudoku Book written by Guy Rinzema and published by Independently Published. This book was released on 2022-12-17 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: If you're an experienced sudoku puzzle solver looking for a real challenge, then the World's Hardest Sudoku Book: 200 of the World's Toughest Sudoku Puzzles (Volume 2) is the book for you. This book features an additional 200 extremely hard sudoku puzzles that will test your skills and mental agility. These are not your average sudoku puzzles - they are designed to be a true test of your puzzle-solving abilities. Whether you're a seasoned sudoku samurai or just starting out on your puzzle-solving journey, this book is sure to provide you with hours of challenging, satisfying, and ultimately rewarding gameplay. With 200 hard sudoku puzzles to solve, this book will keep you entertained and engaged for hours on end. Are you up to the challenge?

The Toughest Sudoku Puzzle Book

Download The Toughest Sudoku Puzzle Book PDF Online Free

Author :
Publisher : Rockridge Press
ISBN 13 : 9781646115822
Total Pages : pages
Book Rating : 4.1/5 (158 download)

DOWNLOAD NOW!


Book Synopsis The Toughest Sudoku Puzzle Book by : Cristina Smith

Download or read book The Toughest Sudoku Puzzle Book written by Cristina Smith and published by Rockridge Press. This book was released on 2020-05-19 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 200+ supercharged Sudoku to test your skills--and boost your brainpower! Whether you're already a pro or you're looking to build your abilities, The Toughest Sudoku Puzzle Book will challenge and entertain you with hours of mind-bending fun. Of all the Sudoku puzzle books, this one's action-packed with 240 clever, creative Sudoku puzzles, plus complete explanations of 14 fail-proof solving techniques to guarantee your success. Unlike standard Sudoku puzzle books, this book contains 18 variations to keep your brain engaged and your pencil sharp. Difficulty increases throughout, culminating in a bonus chapter that will stretch the minds of even the most advanced players. Finally, a helpful hints section provides 3 clues per puzzle to get you over any hurdle. This extraordinary standout among Sudoku puzzle books includes: Level up--Test your problem-solving skills with three epic levels of difficulty, including tough, tougher, and even tear-your-hair-out! Vexing variety--Tackle a wide range of Sudoku types like Twodoku, Jigsaw, Nonconsecutive, and Samurai, which you won't find in other Sudoku puzzle books. Secrets revealed--Discover how to play smarter with 14 basic, intermediate, and advanced techniques designed for Sudoku puzzle books players of all levels. Since it's one of the most challenging Sudoku puzzle books on the planet, this book will blow your mind!

Brain Sudoku Very Hard 200 Puzzles

Download Brain Sudoku Very Hard 200 Puzzles PDF Online Free

Author :
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781548242886
Total Pages : 72 pages
Book Rating : 4.2/5 (428 download)

DOWNLOAD NOW!


Book Synopsis Brain Sudoku Very Hard 200 Puzzles by : Kenton Kupper

Download or read book Brain Sudoku Very Hard 200 Puzzles written by Kenton Kupper and published by Createspace Independent Publishing Platform. This book was released on 2017-06-21 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sudoku 200 unique sudoku puzzle book is very difficult to play the game with all the answers to the end. Games for adults large print challenge and develop their skills.

Sudoku Collection

Download Sudoku Collection PDF Online Free

Author :
Publisher :
ISBN 13 : 9781686337833
Total Pages : 122 pages
Book Rating : 4.3/5 (378 download)

DOWNLOAD NOW!


Book Synopsis Sudoku Collection by : Alena Gurin

Download or read book Sudoku Collection written by Alena Gurin and published by . This book was released on 2019-08-14 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Also the puzzle may contain the regions of random (irregular) shape; this variant is called Jigsaw Sudoku

200 Sudoku Challenges - Very Hard - Volume 4

Download 200 Sudoku Challenges - Very Hard - Volume 4 PDF Online Free

Author :
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781540629258
Total Pages : 84 pages
Book Rating : 4.6/5 (292 download)

DOWNLOAD NOW!


Book Synopsis 200 Sudoku Challenges - Very Hard - Volume 4 by : Tony Mcewan

Download or read book 200 Sudoku Challenges - Very Hard - Volume 4 written by Tony Mcewan and published by Createspace Independent Publishing Platform. This book was released on 2016-11-25 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: 200 Sudoku Challenges - Testing Your Brain To Keep You Young - Very Hard Difficulty Volume 4. One of the books of this Sudoku Puzzle Book Series. This Book Contains 200 Very Hard Sudoku Puzzles with answers, for Sudoku Puzzlers. Welcome to Sudoku Challenges, which provides you with 200 Sudoku puzzles to test your brain to keep you young. This volume gets you started into the fascinating and addictive world of Sudoku. You are joining a family of millions of people worldwide who enjoy challenging themselves everyday. At the start of the Sudoku Challenges puzzle book you will find a brief introduction to the rules of Sudoku if you don't already know them. When you get started on the puzzles you will see that at the top of each puzzle there is a difficulty rating - the higher the number the harder the Sudoku challenge. There are 4 sections of 'Very hard' Sudoku challenges but at the end of the book there are 8 Sudoku challenges that we would describe as extreme difficulty. This is to get you in training and ready for the next book in our series. When you have completed a Sudoku challenge you will find the answers for each section at the end of the book - so you can check how well you have done....or give yourself a clue if you get stuck. Enjoy and good luck!

Genius-Level Sudoku

Download Genius-Level Sudoku PDF Online Free

Author :
Publisher : Workman Publishing Company
ISBN 13 : 1523508124
Total Pages : 417 pages
Book Rating : 4.5/5 (235 download)

DOWNLOAD NOW!


Book Synopsis Genius-Level Sudoku by : Nikoli Publishing

Download or read book Genius-Level Sudoku written by Nikoli Publishing and published by Workman Publishing Company. This book was released on 2020-06-23 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: Warning:Not for the Sudoku faint-of-heart! Introducing a book of extra tough, extra thorny—and extra addictive—puzzles specially designed for people with Einstein-level Sudoku IQs. Sharpen your pencil. Warm up your gray matter. And pit your wits against the top Japanese puzzle makers in the world. Genius-Level Sudoku features more than 300 brand-new challenges, all rated Good Luck! The latest collection from Nikoli, the company that invented the game and helped launch Sudoku-mania worldwide more than twenty years ago, joins The Original Sudoku, Expert Sudoku, X-Treme Sudoku, and other books and calendars with over 3 million copies in print. Nikoli is famous not only for being the first to make Sudoku puzzles, but for being the best—each puzzle is handcrafted, not churned out by a computer program, which makes it uniquely elegant and interactive. The authors are with their solver every step of the way, anticipating the next move and putting up roadblocks. This next level—genius level—is for every puzzler who craves extreme challenge and actually enjoys having their neurons tied in knots—as, number by number, the solution falls into place and they can celebrate victory.

200 Sudoku Challenges

Download 200 Sudoku Challenges PDF Online Free

Author :
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781537301860
Total Pages : 84 pages
Book Rating : 4.3/5 (18 download)

DOWNLOAD NOW!


Book Synopsis 200 Sudoku Challenges by : Tony Mcewan

Download or read book 200 Sudoku Challenges written by Tony Mcewan and published by Createspace Independent Publishing Platform. This book was released on 2016-08-26 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: 200 Sudoku Challenges - Testing Your Brain To Keep You Young - Very Hard Volume 2. Book one of the Sudoku Puzzle Book Series. This Book Contains 200 Very Hard Sudoku Puzzles with answers to those Sudoku puzzles. Welcome to Sudoku Challenges, which provides you with 200 Sudoku puzzles to test your brain to keep you young. This volume gets you started into the fascinating and addictive world of Sudoku. You are joining a family of millions of people worldwide who enjoy challenging themselves everyday. At the start of the Sudoku Challenges puzzle book you will find a brief introduction to the rules of Sudoku if you don't already know them. When you get started on the puzzles you will see that at the top of each puzzle there is a difficulty rating - the higher the number the harder the Sudoku challenge. There are 4 sections of 'Very Hard' Sudoku challenges but at the end of the book there are 8 Sudoku challenges that we would describe as Extreme difficulty. This is to get you in training and ready for the next book in our series. When you have completed a Sudoku challenge you will find the answers for each section at the end of the book - so you can check how well you have done....or give yourself a clue if you get stuck. Enjoy and good luck!

200 Sudoku Challenges - Very Hard - Volume 3

Download 200 Sudoku Challenges - Very Hard - Volume 3 PDF Online Free

Author :
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781540613691
Total Pages : 84 pages
Book Rating : 4.6/5 (136 download)

DOWNLOAD NOW!


Book Synopsis 200 Sudoku Challenges - Very Hard - Volume 3 by : Tony Mcewan

Download or read book 200 Sudoku Challenges - Very Hard - Volume 3 written by Tony Mcewan and published by Createspace Independent Publishing Platform. This book was released on 2016-11-25 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: 200 Sudoku Challenges - Testing Your Brain To Keep You Young - Very Hard Difficulty Volume 3. One of the books of this Sudoku Puzzle Book Series. This Book Contains 200 Easy Sudoku Puzzles with answers, for Sudoku Puzzlers. Welcome to Sudoku Challenges, which provides you with 200 Sudoku puzzles to test your brain to keep you young. This volume is the next step into the fascinating and addictive world of Sudoku. You are joining a family of millions of people worldwide who enjoy challenging themselves everyday. At the start of the Sudoku Challenges puzzle book you will find a brief introduction to the rules of Sudoku if you don't already know them. When you get started on the puzzles you will see that at the top of each puzzle there is a difficulty rating - the higher the number the harder the Sudoku challenge. There are 4 sections of 'Very hard' Sudoku challenges but at the end of the book there are 8 Sudoku challenges that we would describe as extreme difficulty. This is to get you in training and ready for the next book in our series. When you have completed a Sudoku challenge you will find the answers for each section at the end of the book - so you can check how well you have done....or give yourself a clue if you get stuck. Enjoy and good luck!

200 Sudoku Challenges - Very Hard - Volume 10

Download 200 Sudoku Challenges - Very Hard - Volume 10 PDF Online Free

Author :
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781541354531
Total Pages : 84 pages
Book Rating : 4.3/5 (545 download)

DOWNLOAD NOW!


Book Synopsis 200 Sudoku Challenges - Very Hard - Volume 10 by : Tony Mcewan

Download or read book 200 Sudoku Challenges - Very Hard - Volume 10 written by Tony Mcewan and published by Createspace Independent Publishing Platform. This book was released on 2016-12-30 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: 200 Sudoku Challenges - Very Hard - Volume 10 Testing Your Brain To Keep You Young 200 Sudoku Challenges - Testing Your Brain To Keep You Young - Very Hard Difficulty Volume 10 This Book Contains 200 Very Hard Sudoku Puzzles with answers, for Sudoku Puzzlers. Welcome to Sudoku Challenges, which provides you with 200 Sudoku puzzles to test your brain to keep you young. This volume is the next step into the fascinating and addictive world of Sudoku. You are joining a family of millions of people worldwide who enjoy challenging themselves everyday. At the start of the Sudoku Challenges puzzle book you will find a brief introduction to the rules of Sudoku if you don't already know them. When you get started on the puzzles you will see that at the top of each puzzle there is a difficulty rating - the higher the number the harder the Sudoku challenge. There are 4 sections of 'Very hard' Sudoku challenges but at the end of the book there are 8 Sudoku challenges that we would describe as extreme difficulty. This is to get you in training and ready for the next book in our series. When you have completed a Sudoku challenge you will find the answers for each section at the end of the book - so you can check how well you have done....or give yourself a clue if you get stuck. Enjoy and good luck!

200 Sudoku Challenges - Very Hard - Volume 8

Download 200 Sudoku Challenges - Very Hard - Volume 8 PDF Online Free

Author :
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781541354272
Total Pages : 84 pages
Book Rating : 4.3/5 (542 download)

DOWNLOAD NOW!


Book Synopsis 200 Sudoku Challenges - Very Hard - Volume 8 by : Tony Mcewan

Download or read book 200 Sudoku Challenges - Very Hard - Volume 8 written by Tony Mcewan and published by Createspace Independent Publishing Platform. This book was released on 2016-12-30 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: 200 Sudoku Challenges - Testing Your Brain To Keep You Young - Very Hard Difficulty Volume 8 This Book Contains 200 Very Hard Sudoku Puzzles with answers, for Sudoku Puzzlers. Welcome to Sudoku Challenges, which provides you with 200 Sudoku puzzles to test your brain to keep you young. This volume is the next step into the fascinating and addictive world of Sudoku. You are joining a family of millions of people worldwide who enjoy challenging themselves everyday. At the start of the Sudoku Challenges puzzle book you will find a brief introduction to the rules of Sudoku if you don't already know them. When you get started on the puzzles you will see that at the top of each puzzle there is a difficulty rating - the higher the number the harder the Sudoku challenge. There are 4 sections of 'Very hard' Sudoku challenges but at the end of the book there are 8 Sudoku challenges that we would describe as extreme difficulty. This is to get you in training and ready for the next book in our series. When you have completed a Sudoku challenge you will find the answers for each section at the end of the book - so you can check how well you have done....or give yourself a clue if you get stuck. Enjoy and good luck!

200 Sudoku Challenges - Very Hard - Volume 6

Download 200 Sudoku Challenges - Very Hard - Volume 6 PDF Online Free

Author :
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781540647610
Total Pages : 84 pages
Book Rating : 4.6/5 (476 download)

DOWNLOAD NOW!


Book Synopsis 200 Sudoku Challenges - Very Hard - Volume 6 by : Tony McEwan

Download or read book 200 Sudoku Challenges - Very Hard - Volume 6 written by Tony McEwan and published by Createspace Independent Publishing Platform. This book was released on 2016-11-27 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: 200 Sudoku Challenges - Testing Your Brain To Keep You Young - Very Hard Difficulty Volume 6. This Book Contains 200 Very Hard Sudoku Puzzles with answers, for Sudoku Puzzlers. Welcome to Sudoku Challenges, which provides you with 200 Sudoku puzzles to test your brain to keep you young. This volume is the next step into the fascinating and addictive world of Sudoku. You are joining a family of millions of people worldwide who enjoy challenging themselves everyday. At the start of the Sudoku Challenges puzzle book you will find a brief introduction to the rules of Sudoku if you don't already know them. When you get started on the puzzles you will see that at the top of each puzzle there is a difficulty rating - the higher the number the harder the Sudoku challenge. There are 4 sections of 'Very hard' Sudoku challenges but at the end of the book there are 8 Sudoku challenges that we would describe as extreme difficulty. This is to get you in training and ready for the next book in our series. When you have completed a Sudoku challenge you will find the answers for each section at the end of the book - so you can check how well you have done....or give yourself a clue if you get stuck. Enjoy and good luck!

200 Sudoku Challenges - Very Hard - Volume 9

Download 200 Sudoku Challenges - Very Hard - Volume 9 PDF Online Free

Author :
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781541355057
Total Pages : 84 pages
Book Rating : 4.3/5 (55 download)

DOWNLOAD NOW!


Book Synopsis 200 Sudoku Challenges - Very Hard - Volume 9 by : Tony Mcewan

Download or read book 200 Sudoku Challenges - Very Hard - Volume 9 written by Tony Mcewan and published by Createspace Independent Publishing Platform. This book was released on 2016-12-30 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: 200 Sudoku Challenges - Very Hard - Volume 9 Testing Your Brain To Keep You Young 200 Sudoku Challenges - Testing Your Brain To Keep You Young - Very Hard Difficulty Volume 9 This Book Contains 200 Very Hard Sudoku Puzzles with answers, for Sudoku Puzzlers. Welcome to Sudoku Challenges, which provides you with 200 Sudoku puzzles to test your brain to keep you young. This volume is the next step into the fascinating and addictive world of Sudoku. You are joining a family of millions of people worldwide who enjoy challenging themselves everyday. At the start of the Sudoku Challenges puzzle book you will find a brief introduction to the rules of Sudoku if you don't already know them. When you get started on the puzzles you will see that at the top of each puzzle there is a difficulty rating - the higher the number the harder the Sudoku challenge. There are 4 sections of 'Very hard' Sudoku challenges but at the end of the book there are 8 Sudoku challenges that we would describe as extreme difficulty. This is to get you in training and ready for the next book in our series. When you have completed a Sudoku challenge you will find the answers for each section at the end of the book - so you can check how well you have done....or give yourself a clue if you get stuck. Enjoy and good luck!

Sudoku Brain Games

Download Sudoku Brain Games PDF Online Free

Author :
Publisher :
ISBN 13 : 9781984216885
Total Pages : 52 pages
Book Rating : 4.2/5 (168 download)

DOWNLOAD NOW!


Book Synopsis Sudoku Brain Games by : Richard Graham

Download or read book Sudoku Brain Games written by Richard Graham and published by . This book was released on 2018-01-26 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sudoku puzzle book. The 200 puzzles increase in difficulty from warm-ups to total mind-bogglers-perfect for players who want to gradually improve their skills and for masters who want a range of challenges to stay sharp.

200 Sudoku Challenges - Very Hard - Volume 5

Download 200 Sudoku Challenges - Very Hard - Volume 5 PDF Online Free

Author :
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781540631664
Total Pages : 84 pages
Book Rating : 4.6/5 (316 download)

DOWNLOAD NOW!


Book Synopsis 200 Sudoku Challenges - Very Hard - Volume 5 by : Tony Mcewan

Download or read book 200 Sudoku Challenges - Very Hard - Volume 5 written by Tony Mcewan and published by Createspace Independent Publishing Platform. This book was released on 2016-11-25 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: 200 Sudoku Challenges - Testing Your Brain To Keep You Young - Very Hard Difficulty Volume 5. This Book Contains 200 Very Hard Sudoku Puzzles with answers, for Sudoku Puzzlers. Welcome to Sudoku Challenges, which provides you with 200 Sudoku puzzles to test your brain to keep you young. This volume is the next step into the fascinating and addictive world of Sudoku. You are joining a family of millions of people worldwide who enjoy challenging themselves everyday. At the start of the Sudoku Challenges puzzle book you will find a brief introduction to the rules of Sudoku if you don't already know them. When you get started on the puzzles you will see that at the top of each puzzle there is a difficulty rating - the higher the number the harder the Sudoku challenge. There are 4 sections of 'Very hard' Sudoku challenges but at the end of the book there are 8 Sudoku challenges that we would describe as extreme difficulty. This is to get you in training and ready for the next book in our series. When you have completed a Sudoku challenge you will find the answers for each section at the end of the book - so you can check how well you have done....or give yourself a clue if you get stuck. Enjoy and good luck!

200 Sudoku Challenges - Very Hard - Volume 7

Download 200 Sudoku Challenges - Very Hard - Volume 7 PDF Online Free

Author :
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781541337572
Total Pages : 84 pages
Book Rating : 4.3/5 (375 download)

DOWNLOAD NOW!


Book Synopsis 200 Sudoku Challenges - Very Hard - Volume 7 by : Tony Mcewan

Download or read book 200 Sudoku Challenges - Very Hard - Volume 7 written by Tony Mcewan and published by Createspace Independent Publishing Platform. This book was released on 2016-12-29 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: 200 Sudoku Challenges - Testing Your Brain To Keep You Young - Very Hard Difficulty Volume 7 This Book Contains 200 Very Hard Sudoku Puzzles with answers, for Sudoku Puzzlers. Welcome to Sudoku Challenges, which provides you with 200 Sudoku puzzles to test your brain to keep you young. This volume is the next step into the fascinating and addictive world of Sudoku. You are joining a family of millions of people worldwide who enjoy challenging themselves everyday. At the start of the Sudoku Challenges puzzle book you will find a brief introduction to the rules of Sudoku if you don't already know them. When you get started on the puzzles you will see that at the top of each puzzle there is a difficulty rating - the higher the number the harder the Sudoku challenge. There are 4 sections of 'Very hard' Sudoku challenges but at the end of the book there are 8 Sudoku challenges that we would describe as extreme difficulty. This is to get you in training and ready for the next book in our series. When you have completed a Sudoku challenge you will find the answers for each section at the end of the book - so you can check how well you have done....or give yourself a clue if you get stuck. Enjoy and good luck!

200 Sudoku Challenges - Very Hard - Volume 11

Download 200 Sudoku Challenges - Very Hard - Volume 11 PDF Online Free

Author :
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781541371590
Total Pages : 84 pages
Book Rating : 4.3/5 (715 download)

DOWNLOAD NOW!


Book Synopsis 200 Sudoku Challenges - Very Hard - Volume 11 by : Tony Mcewan

Download or read book 200 Sudoku Challenges - Very Hard - Volume 11 written by Tony Mcewan and published by Createspace Independent Publishing Platform. This book was released on 2016-12-31 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: 200 Sudoku Challenges - Testing Your Brain To Keep You Young - Very Hard Difficulty Volume 11 This Book Contains 200 Very Hard Sudoku Puzzles with answers, for Sudoku Puzzlers. Welcome to Sudoku Challenges, which provides you with 200 Sudoku puzzles to test your brain to keep you young. This volume is the next step into the fascinating and addictive world of Sudoku. You are joining a family of millions of people worldwide who enjoy challenging themselves everyday. At the start of the Sudoku Challenges puzzle book you will find a brief introduction to the rules of Sudoku if you don't already know them. When you get started on the puzzles you will see that at the top of each puzzle there is a difficulty rating - the higher the number the harder the Sudoku challenge. There are 4 sections of 'Very hard' Sudoku challenges but at the end of the book there are 8 Sudoku challenges that we would describe as extreme difficulty. This is to get you in training and ready for the next book in our series. When you have completed a Sudoku challenge you will find the answers for each section at the end of the book - so you can check how well you have done....or give yourself a clue if you get stuck. Enjoy and good luck!

Sudoku Puzzle Book

Download Sudoku Puzzle Book PDF Online Free

Author :
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781533460370
Total Pages : 138 pages
Book Rating : 4.4/5 (63 download)

DOWNLOAD NOW!


Book Synopsis Sudoku Puzzle Book by : Adam Williams

Download or read book Sudoku Puzzle Book written by Adam Williams and published by Createspace Independent Publishing Platform. This book was released on 2016-06-17 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Sudoku A Day Exercises The Brain These fun Sudoku puzzles will sharpen your concentration and keep you entertained for hours! This Logic & Brain Teasers Puzzle Book For The Die Hard Puzzlers Contains 200 Very Difficult Sudoku Puzzles with answers. Features: - 200 Sudoku Puzzles - Divided into 4 sets - Big grids for easy solving - Lots of space for note taking, with only 2 large print puzzles per page - Solutions for each difficulty level carefully arranged and referenced