Samurai Sudoku Book is a collection of 500 Easy to Hard Sudoku puzzles overlapping into 100 samurai style. Part of the popular 'Logic & Brain Teasers Series', the book is designed to help keep your brain cognitively fit, flexible, and young. This Samurai Sudoku 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) and large print font for prevention of eye-strain. * 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)