Bargain (and DRM-free) @ 99 cents each from Nebula Award-winning author Walter Jon Williams (
ISFDB,
Wikipedia); couponable/VIP-eligible from Kobo, but these are distributed via Smashwords to all the usual stores, in case you wanted to give the author more money via the greater royalty from a direct sale:
- Implied Spaces, a “sword and singularity” space opera adventure novel (Wikipedia) originally published by Night Shade Books in 2008, which placed 9th in the Locus Awards for Best SF Novel. @ Smashwords
- The Rift, a speculative fiction disaster what-if novel about the aftereffects of a megaquake (Wikipedia), originally published by HarperPrism in 1999. @ Smashwords
The author also offers a freebie copy of his 2001 Nebula Award-winning story:
Daddy's World, and prices several novellas under $1 each, if you're interested.