I ordered a book for 2.92 on 10/31/08. The debit showed up on my account on 11/3. Another debit for 1.00 showed up also on the same date; then another debit for $29.95 on 11/10/08. The invoice in the box did not show a price at all. When I called I was told the 29.95 was "membership fee".
The website does not tell you or require to sign up for a membership.