Improved concentration, relaxation, better memory, and problem-solving skills are just a few of the many benefits you can reap from working Kakuro or "cross-sum" puzzles. These 150 assorted-difficulty Kakuro puzzles will challenge you and provide hours of fun for puzzlers of all ages. If you like Sudoku, you'll love Kakuro. 150 Puzzles Pocket-size format Perfect for both kids and adults Solutions for every puzzle provided Hours of brain-teasing fun