These guys are crooks - but legal crooks. When you order anything, they then sign you up for a "membership." I was lucky in that it was only $9.95 per month. They tell you that you have to call and cancel within 3 days or whatever, but we all get distracted and forget to cancel. The meter keeps on running. And because the charge is low, we overlook it.
I called today to cancel and asked why I am being charged. I was told about the book I bought last September. I told them to kill my membership immediately which they did. Even gave me a cancellation number and when I asked for a refund they gave me two month's worth. But it could reoccur so we got to stay vigilant. These slim balls are within the law but they are unethical nevertheless.