X-link to the DRM-free megathread for some new bundles:
The Story Collection Bundle from StoryBundle contains single author short story collections with contributions by many award-nominated and -winning authors known for their science fiction, fantasy, and horror, including Elizabeth Hand, Kathe Koja, Walter Jon Williams, and more. This is a really good deal if you happen to like speculative fiction in the short form, as the authors have included many of their actual award-nominated/winning stories, and the top-tier is a low $12 for 8 collections with at least a half-dozen stories each, and the C. C. Finlay collection even includes author's notes.
Also, there's another sfnal retro RPG guidebook offering from Bundle of Holding.