This book was recommended by a client. I bought it. It sat on the table while I trained and completed the San Diego Marathon. Oh, how I wish it had been a part of my training!. My husband wanted to lose 20+ lbs. so we began together. 8 weeks and 25 lbs. for him and 9 lbs. for me we can't believe it. Never have either of us lost bulk like this. We feel great-look great-and know this is a lifestyle worth following.I recomment it for anyone wanting to get off the fat-fad treadmill.