When you buy this book you get an electronic version (PDF file) of the interior of this book. CalcuDoku is a fun and addicting logic puzzle game that combines Sudoku with math. CalcuDoku is a fun way for kids and adults to practice addition, subtraction, multiplication, and division facts. This book is ideal for you if you love to solve difficult CalcuDoku puzzles no matter their size. You do not need to wade through tons of easy CalcuDoku puzzles before getting to the real brain teasers. You will experience extremely hard CalcuDoku 7x7, CalcuDoku 8x8 and CalcuDoku 9x9. You get the perfect mix of different sizes of CalcuDoku to keep you entertained for weeks. Once you pick up this book, you won't be able to put it back down. You have been warned! CalcuDoku Mixed Grids - Hard is a collection of 276 puzzles: 72 hard CalcuDoku 7x7 puzzles 72 hard CalcuDoku 8x8 puzzles 72 hard CalcuDoku 9x9 puzzles 60 extra logic puzzles I guarantee that every logic puzzle in this CalcuDoku puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other PuzzleBooks.net books. CalcuDoku is also known as Square Wisdom, CanCan, MinuPlu, Mathdoku and Calcu-Doku.

When you buy this book you get an electronic version (PDF file) of the interior of this book. Numbricks is a fun and addicting logic puzzle game. It is very similar to Hidoku. The goal of Numbricks is to fill in the missing numbers, in sequential order, going horizontally and vertically only. Unlike Hidoku, diagonal paths are not allowed. This book is ideal for you if you love to solve difficult and big Numbricks puzzles. You do not need to wade through tons of easy Numbricks puzzles before getting to the real brain teasers. You will experience Numbricks 13x13, Numbricks 14x14 and Numbricks 15x15. You get the perfect mix of different sizes of Numbricks to keep you entertained for weeks. Once you pick up this book, you won't be able to put it back down. You have been warned! Numbricks Mixed Grids - Hard is a collection of 276 puzzles: 72 hard Numbricks 13x13 puzzles 72 hard Numbricks 14x14 puzzles 72 hard Numbricks 15x15 puzzles 60 extra logic puzzles I guarantee that every logic puzzle in this Numbricks puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other PuzzleBooks.net books.

When you buy this book you get an electronic version (PDF file) of the interior of this book. Futoshiki is a fun and addicting logic puzzle game that combines Sudoku with inequality constraints. This book is ideal for you if you love to solve difficult Futoshiki puzzles no matter their size. You do not need to wade through tons of easy Futoshiki puzzles before getting to the real brain teasers. You will experience Futoshiki 7x7, Futoshiki 8x8 and Futoshiki 9x9. You get the perfect mix of different sizes of Futoshiki to keep you entertained for weeks. Once you pick up this book, you won't be able to put it back down. You have been warned! Futoshiki Mixed Grids - Hard is a collection of 276 puzzles: 72 hard Futoshiki 7x7 puzzles 72 hard Futoshiki 8x8 puzzles 72 hard Futoshiki 9x9 puzzles 60 extra logic puzzles I guarantee that every logic puzzle in this Futoshiki puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other PuzzleBooks.net books. Futoshiki is also known as Hutoshiki and Unequal.

When you buy this book you get an electronic version (PDF file) of the interior of this book. Slitherlink is a fun and addicting logic puzzle game. The goal seems to be very simple, connect the dots. However, do not be fooled by its simplicity, Slitherlink is a very challenging logic puzzle and is an excellent brain game. This book is ideal for you if you love to solve difficult big Slitherlink puzzles. You do not need to wade through tons of easy Slitherlink puzzles before getting to the real brain teasers. You will experience Slitherlink 20x20, Slitherlink 23x23 and Slitherlink 25x25. You get the perfect mix of different sizes of Slitherlink puzzles to keep you entertained for weeks. Once you pick up this book, you won't be able to put it back down. You have been warned! Slitherlink Mixed Grids - Hard is a collection of 276 puzzles: 72 hard Slitherlink 20x20 puzzles 72 hard Slitherlink 23x23 puzzles 72 hard Slitherlink 25x25 puzzles 60 extra logic puzzles I guarantee that every logic puzzle in this Slitherlink puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other PuzzleBooks.net books. Slitherlink is also known as Fences, Loop the Loop, Dotty Dilemma, Sli-Lin, Great Wall of China, Takegaki, Loopy, Ouroboros, Suriza and Slither Link.

When you buy this book you get an electronic version (PDF file) of the interior of this book. Become a master in solving CalcuDoku. You will experience CalcuDoku 7x7, CalcuDoku 8x8 and CalcuDoku 9x9. You get the perfect mix of different sizes of CalcuDoku to keep you entertained for weeks. After solving all the puzzles in this book, you will be a CalcuDoku Pro. You start with easy CalcuDoku puzzles, which keep getting bigger and bigger and you gradually build your way up to extremely hard CalcuDoku puzzles. Once you pick up this book, you won't be able to put it back down. You have been warned! Only 1 large print puzzle per page, with lots of white space for scribbling. CalcuDoku Mixed Grids Large Print - Easy to Hard is a collection of 276 puzzles: 24 easy CalcuDoku puzzles per grid size, totaling 72 easy puzzles 24 medium CalcuDoku puzzles per grid size, totaling 72 medium puzzles 24 hard CalcuDoku puzzles per grid size, totaling 72 hard puzzles 60 extra logic puzzles I guarantee that every logic puzzle in this CalcuDoku puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other PuzzleBooks.net books. CalcuDoku is also known as Square Wisdom, CanCan, MinuPlu, Mathdoku and Calcu-Doku.

When you buy this book you get an electronic version (PDF file) of the interior of this book. Nurikabe is a fun and addicting binary determination puzzle. This book is ideal for you if you love to solve difficult Nurikabe puzzles no matter their size. You do not need to wade through tons of easy Nurikabe puzzles before getting to the real brain teasers. You get the perfect mix of different sizes of Nurikabe to keep you entertained for weeks. Once you pick up this book, you won't be able to put it back down. You have been warned! Nurikabe Mixed Grids - Hard is a collection of 276 puzzles: 72 hard Nurikabe 10x10 puzzles 72 hard Nurikabe 12x12 puzzles 72 hard Nurikabe 14x14 puzzles 60 extra logic puzzles I guarantee that every logic puzzle in this Nurikabe puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other English PuzzleBooks.net books. Nurikabe is also known as Cell Structure, Islands in the Stream.

When you buy this book you get an electronic version (PDF file) of the interior of this book. Masyu is a fun and addicting logic puzzle game. This book is ideal for you if you love to solve difficult Masyu puzzles no matter their size. You do not need to wade through tons of easy Masyu puzzles before getting to the real brain teasers. You get the perfect mix of different sizes of Masyu to keep you entertained for weeks. Once you pick up this book, you won't be able to put it back down. You have been warned! Masyu Mixed Grids - Hard is a collection of 276 puzzles: 72 hard Masyu 11x11 puzzles 72 hard Masyu 13x13 puzzles 72 hard Masyu 15x15 puzzles 60 extra logic puzzles I guarantee that every logic puzzle in this Masyu puzzle book has been carefully checked to ensure that each puzzle has only 1 solution. None of the puzzles in this book will appear in any of the other English PuzzleBooks.net books. Masyu is also known as Shiroshinju Kuroshinju, White Pearls and Black Pearls.