Baen Ebooks is an e-book supplier operated by Baen Books. It sells e-books for Baen and some other publishers, as well as hosting the Baen Free Library. Unlike most e-book suppliers, it does not use Digital Rights Management (i.e., copy protection). Purchasers can download the same e-book in seven different formats (BBeB, EPUB, HTML, Microsoft Reader Mobipocket, Rocketbook, and RTF), even long after the initial purchase. Their range of genres offered is heavy on science fiction and fantasy.