It's smart. It's stylish. It's fun! And with its unique design, is bound to be the "must-have" collection for any puzzle fan. Edited by crossword great Will Shortz, this beautiful book offers 400 easy-to-hard puzzles in a convenient portable size, perfect for carrying in your purse, briefcase, or backpack. Features: * 400 sudoku puzzles, arranged according to difficulty * Sleek design with a covered spiral binding makes it easy to solve puzzles * Durable hardcover protects the book as it travels with you wherever you go* The perfect gift for any holiday * Edited by Will Shortz.