<p/><br></br><p><b> Book Synopsis </b></p></br></br>Put your brain through it's paces with this Brain Gym book of 400 Medium Sudoku puzzles. 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! This book contains solutions to all the puzzles. 140 pages, 4 puzzles per page. 8.5 by 11".