On fat burners

I've been reading over the various sales letters and information on site of fitness guru Matt Furey. One of his product is Combat Abs, which supposedly shows you both exercises, diet and breathing exercises that are terrific fat burners for creating a great set of abs on you. Also, I did some of the crunches described by John Peterson in his book Pushing Yourself to Power, and that was the most work I've done with my stomach muscles in a long time, and a real eye open. Deep inside, my abs are still quite strong, but they have a much thicker layer of fat over them that I want to think about.