The Adventure Sci-Fi bundle from StoryBundle contains a ton of reading from a variety of authors, including Robert J. Sawyer and Kevin J. Anderson. It is a great complement to the current Adventures in Science Fiction Humble Book Bundle, which ends soon.
The latest Humble Book Bundle collects a gigantic stack of sci-fi eBooks — 24, in total, for those who pay $18 or more to unlock the full bundle. Greg Bear, Joe Haldeman, and Poul Anderson are just three of the authors represented in this bundle. Get the bundle here!