Mybookcart.com is a nationwide textbook buyback service headquartered in Deep River, CT. Mybookcart.com offers instant buyback price quotes for college books. Type in your textbooks' ISBN numbers into the Mybookcart.com homepage to see how much your books are being bought back for. Return shipping is free for all buybacks. Payment is fast by check or PayPal. In business for over 10 years with excellent customer service.