Various tools for writers operated by the ReAnimus Press crew:

The Issue at Hand, by James Blish (as William Atheling, Jr.)
Staying Alive - A Writer

General:

Specific to Smashwords:

Space Travel - A Science Fiction Writer
In Search of Wonder, by Damon Knight
Anthopology 101: Reflections, Inspections and Dissections of SF Anthologies, by Bud WebsterMore Issues at Hand, by James Blish (as William Atheling, Jr.)How To Improve Your Speculative Fiction Openings, by Robert QualkinbushHaving Relationships With Characters on the Road to Great Fiction, by Andrew BurtThe Craft of Writing Science Fiction that Sells, by Ben BovaOf Worlds Beyond, by Lloyd Arthur Eshbach, ed.Aggressor Six, by Wil McCarthyDreams That Burn in the Night, by Craig StreteMaelstrom, by Roby JamesKaheesh, by Jerry SohlSiege of Stars: Book One of The Sigil Trilogy, by Henry GeeTest of Fire, by Ben Bova