Jigsaw Sudoku, known as Geometric Sudoku shares the same rules as a regular Sudoku puzzle, with the only difference being the fact that Jigsaw Sudoku has irregular shaped blocks as opposed to the 3x3 square blocks in a regular Sudoku puzzle. This book will help you exercise your brain muscles with fun and entertaining Sudoku puzzles. Features: 6 x 9 inches format 4 puzzles per page 200 puzzles Solutions included Premium glossy cover