Tons of Sudoku Puzzles for Adults & Seniors

This Sudoku book is packed with the following features: * 1008 Sudoku Puzzles for everyone in 6 Difficulty Levels: 168 Very Easy, 168 Easy, 168 Medium, 168 Hard, 168 Very Hard, 168 Extreme. * Includes free bonus puzzles you can download book (Fitness for your brain: Word Search With Hidden Message: Train your brain anywhere, anytime - 102 Puzzles for Adults and Seniors) * Answers to every puzzle are provided at the back of the book. * Each puzzle is guaranteed to have only one solution. * six puzzles per page (8.5 x 11 inches). Tons of Sudoku Puzzles for Adults and Seniors Book is a collection of more than 1000 sudoku puzzles. Part of the popular 'Brain Games for Adults' series, the book is designed to help keep your brain cognitively fit, flexible, and young. Tons of Sudoku Puzzles for Adults and Seniors Book are sorted into six levels of difficulty (very easy, easy, medium, hard, very hard and extreme).