These 500+ Sudoku Puzzles are Easy on the Eyes and Challenging to the Mind. Your mind and the minds of your friends deserve this entertaining workout, testing knowledge of words, trivia, and spelling. This Sudoku puzzle book Included: ◆ 500+ easy to hard level Sudoku puzzles ◆ Many horse of challenge and fun ◆ Solutions included for checking and cheating ◆ 8.5*11 perfect size for your bag, purse and very handy This Big Sudoku Puzzle Book is a perfect gift for adults, seniors and all puzzle fan lovers for any gift-giving occasion.