Sudoku X Puzzle Book: 500 Easy to Hard: : Keep Your Brain Young (Paperback) (ISBN-13: 9781698922140)

The objective of Sudoku X is to fill every row, column, diagonal and box (3x3grid) with numbers 1-9 and each row, column, and box must have each number exactly once.

This Sudoku book is packed with the following features:

• 500 Easy to Hard Sudoku X Puzzles
• Answers to every puzzle are provided at the back of the book.
• 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)

SUDOKU X Puzzle Book is a collection of 500 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.

SUDOKU X Puzzle Book are sorted into three levels of difficulty (easy, medium and hard).