The Extreme Rapid Fat Loss Handbook takes The Rapid Fat Loss Handbook by Lyle McDonald to another level. Whereas RFL allowed folks to lose 4-7 pounds of fat in two weeks, The Extreme Rapid Fat Loss Handbook can strip up to 4.5 pounds of fat in only 4 days. And yes that's actual fat, not just water weight.
The Extreme Rapid Fat Loss handbook is an extreme program involving extreme dieting and exercise but it is scientifically proven to work. The book also includes modifications for people who can't follow the exact program as laid out but who will lose a tremendous amount of fat in only a few days.