500 Sudoku Puzzles, Easy and Medium: Brain Gym Series Book

Put your brain through it's paces with this Brain Gym book of 500 Sudoku puzzles, containing 250 easy and 250 medium difficulty. We exercise our bodies but our brains need a workout too! Sudoku helps keep your brain healthy and functioning well. Challenge yourself to finish all the puzzles without cheating! Solutions to all the puzzles are at the end of the book. 178 pages, 4 puzzles per page. 8.5 by 11".