I didn't know that. I used them a few times because book depository points you there if they don't have a book.

I had one book not show up from there and the seller did refund me and sent an apology. It ended in this

"We hope that once the book comes, you will still be able to use it and find much enjoyment from it. If I can be of any further assistance, please don't hesitate to contact me again." God that irritated me. It also never showed up and it has been a year.