This wonderful puzzle book contains 100 jigsaw Sudoku puzzles. It also has all of the solutions printed at the back of the book. Jigsaw sudoku is an enjoyable sudoku variant, so if you like the logic puzzle that has taken the world by storm that is sudoku, you're sure to love jigsaw sudoku, also kwn as irregular sudoku. The rules of jigsaw sudoku are simple: place 1-9 once in each row, column and irregular shaped jigsaw region containing 9 cells. Each puzzle has one unique solution that can be reached through the application of logical rules. There are a large number of different grid patterns to tackle in this book, which means that each different style of grid solves in a different way. If you like rmal sudoku but are looking for a new sudoku-related challenge, then jigsaw sudoku could be the book for you!