I've always been impressed with Baen. They took a hard stance against DRM from the beginning.

Baen Ebooks, like its predecessor, does not use DRM (i.e., copy protection), in accordance with Jim Baen's belief that DRM "just made it hard for people to read books, the worst mistake a publisher could make." Eric Flint, writing soon after Baen's death in 2006, noted that "in his fight against DRM, Jim stood alone as a publisher" and argued that Baen Book's success "demonstrated in practice that all the propaganda [in favor of] DRM is, in addition to everything else, so much hogwash even on the practical level of a publishing house's profits and losses."