X-link to the Comics megathread for aficionados of The X-Files, which is technically classed as science fiction (albeit putting a whole lot of fiction into the science):
Humble Comics Bundle The X-Files presented by IDW is good for the next two weeks, and contains both the new comics series continuation of the TV show (which itself is getting a miniseries revival), as well as the older GN adaptations of the TV episodes and tie-in novels (some written by Star Wars tie-in writer Kevin J. Anderson (
ISFDB,
Wikipedia)), and the old Topps Comics original comics stories (some of them written by horror novelist Stefan Petrucha (
ISFDB,
Wikipedia)), which I've read a good chunk of and consider to be quite good quality and recommended, if you're into spooky occult/weird nature research/advanced tech R&D conspiracy investigation stories.
ETA: 2 of the tie-in novels are prose versions, with the 3rd being a GN adaptation. And there's a new prose short story anthology as well at the top tier, with notable contributors like British Fantasy Award winner Tim Lebbon (
ISFDB,
Wikipedia).
Also, x-link to the
DRM-free megathread for a few new bundles that might be of interest:
StoryBundle has a
Sci-Fi Spectrum Bundle mostly with contributions from indie authors, as well as an
Historical Fiction Bundle which contains two backlist historical pirate fantasy novels.
Humble Bundle also has the
Humble Book Bundle DIY presented by Make which contains mostly science/tech self-instruction books, but does also contain a new anthology of sfnal technology short stories, and an history of steampunk which features Q&As with selected influential sfnal authors like Bruce Sterling (
ISFDB,
Wikipedia) and Margaret Atwood (
ISFDB,
Wikipedia), among others.