Young puzzlers can put their number and logic skills to the test with this ultimate book of over 180 sudoku puzzles. Inside you'll find puzzles for everyone, from sudoku beginners to number ninjas. Each puzzle is graded by skill level so start wherever you feel comfortable-then level up when you're ready for a challenge. With fun cartoon illustrations, this collection provides hours of fun and satisfaction while improving memory and critical thinking too! 192 pages, softcover. Ages 7 and up.