200 Original Cross-Sums Puzzles for Brain-Sharpening Entertainment

Kakuro is the latest puzzle craze to sweep the nation. Also called "cross-sums", it is similar to sudoku in that it involves placing numbers in a grid in a specific pattern. And, it is similar to crossword puzzles in that it offers clues. This book, written by puzzle master Terry Stickels, features 200 original puzzles in five difficulty levels.