The guy you are talking about is Kevin Trudeau. I recently saw his infomercial selling his book
"Natural Cures 'They' Don't Want you to Know About."
This guy has also sold the "Mega Memory System" which supposedly helps improve your memory, Coral Calcium Supreme, a dietary supplement which could supposedly cure cancer, and Biotape, an adhesive strip, which supposedly provides permanent relief from severe pain.
Interestingly enough, the Federal Trade Commision recently banned him from doing informercials. However, I saw him on television last week.
FTC Bans Kevin Trudeau from Infomercials
It pisses me off when people try to take advantage of those who are so desperate for any chance of cure from chronic illness. I remember seeing reports on 20/20 of con-artists who stole hundreds of thousands of dollars from cancer patients who were clinging to their last shreds of hope for cure. I always thought that it would be fitting for these con-artists to be stricken with the same diseases that they claimed they could cure.