Here's a link to a book I've seen a lot: http://www.amazon.com/gp/product/1580175422/sr=8-1/qid=1150483560/ref=sr_1_1/104-0535243-9121512?%5Fencoding=UTF8 It looks really good and have been tempted to buy it a few times, but since I'm such a tightwad, I haven't. It's got tons of exercises geared towards muscle groups that help you be a better rider. Elly