Flex your memory muscle with a variety of puzzles in varying degrees of difficulty Studies have shown that puzzles like Sudoku, crosswords, cryptograms, and other "e;mental aerobics"e; can help reduce memory loss due to normal aging and minimize the risk of developing neurodegenerative diseases. Featuring a sample of puzzles and ranked by difficulty, this pocket edition is a surefire way to boost your mental fitness. Open the book and find: Sudoku puzzles Crosswords Word scrambles Cryptograms Logic puzzles Riddles and word searches