I ordered a book from World of Books on eBay, got it on time and for reasonable price, but, after inspection, I decided to contact the seller because there was a printing issue in my copy that made 15 pages unreadable. World of Books acted promptly sending me another copy without issues free of charges. This was my first order from World of Books but now I know I wouldn't hesitate to make another one or to recommend the seller to someone else.