If you're a mobile sort and like to read up on what exercises you can do on the go, then the famous for dummies series could be just for you. Don't be fooled by the title, these books, explain things in a clear and concise fashion and quickly moves on to some great exercises you can do. Exercise Balls for Dummies give you some great ideas for workouts and making the most of your exercise ball. The books is available for £10.49 from Amazon.