In case you've been wondering just what this popular game/puzzle called Sudoku is...it is a puzzle in which players insert the numbers one to nine into a grid consisting of nine squares subdivided into a further nine smaller squares in such a way that every number appears once in each horizontal line, vertical line, and square. Highly addictive fun for all ages!

• Each Pocket Digest Sudoku Plus™ book measures 8 inches tall
• Sold in increments of 6 books
• Assorted styles
• Designs may vary