Various tools for writers operated by the ReAnimus Press crew:

Space Travel - A Science Fiction Writer
The Issue at Hand, by James Blish (as William Atheling, Jr.)

General:

Specific to Smashwords:

More Issues at Hand, by James Blish (as William Atheling, Jr.)
How To Improve Your Speculative Fiction Openings, by Robert Qualkinbush
In Search of Wonder, by Damon KnightThe Craft of Writing Science Fiction that Sells, by Ben BovaHaving Relationships With Characters on the Road to Great Fiction, by Andrew BurtThe Science Fiction Novel, by Basil Davenport, Robert A. Heinlein, C. M. Kornbluth, Alfred Bester, and Robert BlochAnthopology 101: Reflections, Inspections and Dissections of SF Anthologies, by Bud WebsterOf Worlds Beyond, by Lloyd Arthur Eshbach, ed.Staying Alive - A WriterFires of the Desert, by Leona WisokerOf Sand Ships & Silent Silicate Seas, by Bruce TaylorHellFar Out, by Damon KnightBeautiful Soup, by Harvey Jacobs