Via Books on the Knob I've just find out about a promotion of the Codex Writers Group that includes 12 free ebooks:
Come get a taste of speculative fiction that shakes the foundations and rattles the windows of genre. Writers from the Codex Writers Group (codexwriters.com) are giving away ebooks on September 26-27 on Amazon.com. Arthurian fantasy? Urban Fantasy? Horror-tinged thrills? Stories from the far future? We got them all...and they're all FREE on September 26-27!