X-link to the DRM-free megathread for 2 new bundles with sfnal content:
Humble Music Book Bundle includes a Prime Books-published best-of reprint anthology of rock music-related sf/fantasy stories with some major genre names in it, some new steampunk contributions co-written by Rush drummer Neil Peart & Kevin J. Anderson, and a psychic fantasy novel centred around classical music (and a backlist Beatles-memorabilia-based mystery novel), plus some graphic novels with speculative fiction musical themes as well.
Indie Superhero novel bundle from StoryBundle includes a contribution by John W. Campbell Award-winner Mur Lafferty.