Whether you have a shiny new mountain bike or one that has been on more than a few trail rides, this book is a must to have in your collection. For about [price] and the price of some tools you'll be able to perform the most common maintenance on your bike yourself. Not only will this save you money (tuneups aren't exactly cheap these days), but you'll understand your equipment much better and be able to handle unexpected situations on the trail.The book is a large format with two columns of text per page and hand drawn figures (basically no photos). Each part of the bike is covered in great depth in pseudo-outline form.The only downside is that the figures can be a bit difficult to understand. I can see how they can be more clear that photos, but some combination of the two or perhaps just more figures would have helped. I've found it is always best to look at the figures alongside my bike so there is no ambiguity.