Jigsaw Sudoku Puzzles Twist your mind in new and unexpected ways with the game of jigsaw sudoku puzzles. If you already enjoy and know how to play regular sudoku, you will love this book of irregular sudoku. This puzzle book starts out slow and easy with 25 easy sudoku. After that you can move on to 25 medium sudoku, 25 difficult sudoku, and end up with 25 expert sudoku. That's enough puzzling to keep you entertained for quite a while! The large roomy sudoku grids and sturdy construction gives you plenty of opportunity to pencil in and erase possible solutions. These sudoku puzzles would be fun for adults and kids from 12 and up.