Buy one book and choose another FREE, every time across their range of thousands. Order two books, and the cheaper one will be on them. All they ask is that our members buy four more books from them within the next year (plus take four free of course). The trouble with all those 3 for 2 offers is that you have to buy two books before you even start saving. They at One On Us believed they could do a whole lot better than that which is why theyre offering their members one free book with every book they buy, For every two books they buy, the member will receive the cheaper one on them. Members are committed to buying four more books in a year (plus take four free of course!). After that they can buy as many or as few as they choose but the offer will remain the same Buy 1 Get 1 Free Forever.