If by chance you decided to look up the validity of these company before you buy GREAT FOR YOU. DO NOT buy from this company. I ordered an accounting book for over $200 as it was sold out at my school bookstore. I only had an option of renting from the school and the rental alone was $200 for a used book. I decided to give this pathetic source a try, and they shipped me an edition 3 back from the one I ordered. By this time I had waited and missed an assignment for a 7 week class and still had to purchase the original book. I returned my book to them and to this day still am out of $200+ dollars and cant get anyone on the phone. They are horrible with customer service and take 0 accountability for my misfortune. PLEASE do not order from them.