where to sell books - Check out the new dedicated site just for students. Watch the video to see how to sell a book through unibooks.co.uk. Savvy students make and save money by buying and selling their textbooks through UniBooks.co.uk. UniBooks fees 10% of book price, and you only pay once your book sells, so there is no risk! What are you waiting for?! Sell your books to other students on unibook.co.uk!