Two ebook bundles are offering you the chance to stock up on your summer sci-fi reading selections at a price of your choosing. Through July 23rd StoryBundle is offering a six book collection curated by sci-fi author Kevin J. Anderson. Included are titles like Swarm by B.V. Larson, In Hero Years... I'm Dead by Michael A. Stackpole, and Anderson's own Hopscotch. Those kicking in more than $10 will receive two additional books, including Dune author Frank Herbert's High-Opp.

Humble Bundle is following up last year's ebook offering with its own collection of four titles, including Cory Doctorow's Little Brother and Boneshaker by Cherie Priest. Pay more than the average price, however — it's currently sitting at $9.47 — and customers will also receive Peter Beagle's The Last Unicorn and Just a Geek by Wil Wheaton. Of course, Humble Bundle customers can choose how their particular payment will be doled out between the authors, several charities, or Humble Bundle itself. Both collections are DRM-free, and with just 11 days to go on the Humble Bundle deal you might want to take advantage sooner rather than later.