Samurai Sudoku Book is a collection of 500 Medium 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)