Books for free. That's all we needed to know about BookMooch, an online community dedicated to book exchange. To participate, you list books you no longer want (receive a tenth-of-a-point for every one you list). Once that book is given to someone, you earn a point and can use that point to get any book you want on BookMooch. To be fair, you need to give away at least one book for every five you receive. BookMooch doesn't charge for its service. The only cost to users is the cost of shipping books to others. On a recent search, we found 36,745 books categorized as children's books available for swapping! We have our eye on a copy of Corduroy and some Baby Einstein board books. Let us know if you've ever used BookMooch.