Lot of three books about mountain biking

Bicycling Magazine's Mountain Bikes
Tells how to select an all-terrain bike, discusses useful clothing and equipment, and offers advice on practicing off-road riding skills.

Bicycling Magazine's Mountain Biking Skills: Skills and Techniques to Master Any Terrain
Bicycling Magazine's Mountain Biking Skills by Ben Hewitt has been fully revised and updated to provide enthusiasts with all the tactics, tips, and techniques they need to master any type of terrain. Ride like a pro with help from the editors of Bicycling and Mountain Bike magazines. Learn the most effective ways to handle tough terrain, steer clear of hazardous obstacles, and even crash properly to avoid injury. Bursting with the latest strategies for riding faster and training better, this book will give mountain bikers the tools they need to be their best.

The Ultimate Mountain Bike Book: The definitive illustrated guide to bikes, components, technique, thrills and trails
Mountain biking is now the largest branch of recreational cycling worldwide. Fully revised and updated, The Ultimate Mountain Bike Book tells you everything you need to know about a sport that has grown exponentially since its beginnings in the late 1970s. It explains all the jargon, from your headset to your groupset, and how to ride all terrains from city cycling to off-road technical downhilling.

The Ultimate Mountain Bike Book offers:

technical jargon demystified and equipment explained
what to look for when buying a bike
the latest high-tech innovations
personal fitness: warm-up and cool-down exercises, training plans and nutrition
more than 280 specially commissioned color photographs by expert riders
trip locations
From the Rocky Mountains to Morocco, The Ultimate Mountain Bike Book also includes a guide to the world's best cycling locations - many of them unreachable on more than two wheels. High-impact color photography lends clarity to the technical and instructional sections, and brings the world of adventure rides to life.