I ordered the Flat Belly Diet book and about two months later received two other diet books for my "preview." They claimed that I had authorized being used for previewing other books on related topics when I sent in my order form for the Flat Belly Diet books. Within a week after receiving the books for previewing, I received a bill for the full price of both. I was forced to pay for the return postage, with insurance and proof of receipt, for something I didn't know I was signing up for when I ordered the original... read full review »