Scam! Caution! They took away my book credits (that I paid for without) refunding my money. I had to call them and force them to refund my money. The only explanation they gave me was since I was no longer a Amazon prime member they went ahead and took back my credits that I paid for. I told them that I paid for those credits with my credit card and I want them back and that they have to right to take back book credits that I paid for (thats theft). They refused. Finally they refunded my money.