One thing that is important to keep in mind is that if you think there might actually, truly, be one piece of advice in this book, the cost plus time investment

One thing that is important to keep in mind is that if you think there might actually, truly, be one piece of advice in this book, the cost plus time investment is trivial compared to the potential gains. None of his information is so bogus that you can throw it in the trash with other random "Be Slim in 24 hours" books. Also, note that the placebo effect is still an effect. Fifteen bucks to cure insomnia because you believe it will be cured rather than the ice bath having scientific backing? Sign me up! Not all information is a sure thing, sometimes it pays to start looking at the "this guy is either a genius or a madman, but it is hard to tell" section.