More and more people are turning to puzzles and brainteasers as a way to keep their minds sharp as they age. The Big Book of Bathroom Brain Sharpeners, a bind-up of Little Book of Bathroom Sudoku, Kakuro, and Brainteasers, offers hundreds of fun, stimulating puzzles for all ages and skill levels. It's a great way to test your wits during a commute, over breakfast, or even in the bathroom!