Samurai Sudoku Puzzle Book is a collection of 1000 Hard Sudoku puzzles overlapping into 200 samurai style. Part of the popular " Brain Games for Adults " series, the book is designed to help keep your brain cognitively fit, flexible, and young. Samurai Sudoku are a partial overlapping arrangement of five standard Sudokus. This Samurai Sudoku Puzzle Book is packed with the following features: Answers to every puzzle are provided at the back of the book. Each puzzle is guaranteed to have only one solution. One puzzle per page (8.5 x 11 inches). Includes free bonus puzzles you can download book ( Tons of Sudoku Puzzles for Adults & Seniors ) Includes free bonus puzzles you can download book ( Word Search With Hidden Message: 102 Puzzles for Adults and Seniors)