Many are aware of the Smart Savings Center.com scam. Discount Book Sale.com is a very popular perpetrator of this scam. Beware of purchasing any books from this book re-seller - there is a very real reason why the books are so cheap. As you purchase a book, you may find that you will be charged a monthly "membership" fee of 19.99 per month. When I inquired what the membership was for, the operator on the line could not answer my question.