Yet another in a series of Timothy Ferriss's worthless books. But there's nothing I could say that will sway you -- either you're a rational person and you'll quickly recognize this as foolish junk, or you're already in the 4-hour cult.
At least Ferriss doesn't seem to have evil intent -- he just wants to make money and maybe even believes he's helping people. But this is garbage.
On the other hand, lack of evil intent doesn't take away the harm he causes. This is the guy that popularized the absurd diet advice "Don't eat white food" and having a cheat day once a week to gorge on all the horrible crap you want.