Put your brain through it's paces with this great value Brain Gym book of 1,200 mixed difficulty Sudoku puzzles, perfect for anyone who wants plenty of puzzles to keep them busy. There are 300 easy, 300 medium, 300 hard and 300 very hard puzzles. With only 4 puzzles per page there is plenty of room for small notations and each grid is a good size. 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. 414 pages, 4 puzzles per page. 8.5 by 11".