I purchased a childrens book only to find a primary school stamp inside. I contacted the primary school to be advised that they wish for it to be returned as it must have been sold on or donated by a parent who did not return the book. I contacted World of Books to be told that they would give me 20% refund. Advised that I was not going to keep a book that belongs to someone else and would like a refund. Advised i can have a refund if I post the book back to them at my own cost. So I will be out of pocket and World of Books are selling items that belong to someone else. Fantastic customer service.