Strength and Conditioning for Triathlon: The 4th Discipline by Mark Jarvis is a comprehensive guide to training and conditioning for triathletes. Published by Bloomsbury Publishing in 2013, this trade paperback book covers topics such as strength training, conditioning, and triathlon techniques. With 192 pages and illustrations by the author himself, this book is a valuable resource for athletes looking to improve their performance in triathlons. Whether you are a beginner or a seasoned triathlete, this book offers practical advice and tips to help you achieve your goals in the sport.