SUDOKU Book is a collection of 500 sudoku puzzles. Part of the popular "Logic Puzzles series", the book is designed to help keep your brain cognitively fit, flexible, and young. SUDOKU Book are sorted into three levels of difficulty (Hard, Very Hard and Extreme). This Sudoku book is packed with the following features: 500 Hard to Extreme Sudoku Puzzles 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)
