While I'm sure how to prepare for a half-marathon is highly subjective (I read this preparing for my 5th after all, and have used a different training method each time), I thought this was a very valuable book to read for anybody interested in running half-marathons. The most valuable part of the book for me wasn't so much the chapter on the actual training program, but the most valuable one was a chapter on running physiology which was both scientific but easy to understand, and was connected with the training program so readers would understand the WHY of different runs in a training program. The hydration/nutrition and race day technique chapters were also very valuable.