This Samurai Sudoku book is packed with the following features: - 500 Hard Sudoku puzzles overlapping into 100 Samurai style. - One puzzle per page (8.5 x 11 inches) and large print font for prevention of eye-strain - Answers to every puzzle are provided. - Each puzzle is guaranteed to have only one solution. 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)