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! Become a master in solving Jigsaw Sudoku. After solving all the puzzle in this book, you will be a Jigsaw Sudoku Pro. You start with easy Jigsaw Sudoku puzzle and you gradually build your way up to extremely difficult Jigsaw Sudoku puzzle. 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. Jigsaw Sudoku 12x12 - Easy to Extreme is a collection of 276 puzzle: 54 easy Jigsaw Sudoku 12x12 puzzle 54 medium Jigsaw Sudoku 12x12 puzzle 54 hard Jigsaw Sudoku 12x12 puzzle 54 extreme Jigsaw Sudoku 12x12 puzzle 60 extra logic puzzle The goal of Jigsaw Sudoku is to fill in the empty cells, one number in each, so that each column, row, and region contains each number exactly once. The regions are of irregular shape. I guarantee that every logic puzzle in this Jigsaw 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. Jigsaw Sudoku is also known as Geometry Sudoku, Irregular Sudoku, Squiggly Sudoku, Kikagaku Nanpure.