X-link to the DRM-free thread for new Humble and StoryBundle:
Humble RPG Book Bundle Doctor Who is presented by Cubicle 7, who did a pretty nice job on their license for Charles Stross' Laundry Files. In addition to the campaign stuff, there are also sourcebooks for each of the Doctors detailing their worlds and canon adventures, which non-gaming fans may also be interested in using as a reference, too.
The SF & F Binge Reader Bundle is curated by former Magazine of Fantasy & Science Fiction editor Kristine Kathryn Rusch. It's mainly newer and indie-ish stuff, but there's backlist from Rusch herself in the form of her Diving Universe series originally out from Pyr. If you're interested, there's a generous selection of works, with most of the titles being at least the first 3 novels in their series, plus assorted anthologies.