Humble’s new sci-fi & fantasy ebook bundle has enough reading material to last you for months, if not longer. 26 books are split across four different price tiers, the most expensive of which unlocks at just $18. Titans of sci-fi like Octavia Butler and Robert McCammon are well represented here, as is Timothy Zahn’s incredibly creepy Soulminder, just for starters. As always, you can name your own price, and a portion of the proceeds will go to charity.