2-Week Total Body Turnaround

I finished the 2-Week Total Body Turnaround by Chris Freytag with Alyssa Shaffer. All through the book are these testimonies of people who completed the two weeks and lost 6 pounds and 12 inches!  I'm pretty sure I gained a pound. In the book's defense, I wasn't eating the proposed menus, just trying to stay in Weight Watcher points. But I did the exercises and they were tough! I think the exercises are good so I might continue them, but there is not much chance of me eating tofu. Why do diet books insist on including recipes with tofu? I think we can lose weight without eating tofu!