Various tools for writers operated by the ReAnimus Press crew:

Staying Alive - A 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.)
The Craft of Writing Science Fiction that Sells, by Ben Bova
Of Worlds Beyond, by Lloyd Arthur Eshbach, ed.In Search of Wonder, by Damon KnightHow To Improve Your Speculative Fiction Openings, by Robert QualkinbushAnthopology 101: Reflections, Inspections and Dissections of SF Anthologies, by Bud WebsterSpace Travel - A Science Fiction WriterHaving Relationships With Characters on the Road to Great Fiction, by Andrew BurtTo Make Death Love Us, by Sovereign FalconerOrion Among the Stars, by Ben BovaThe Dueling Machine, by Ben BovaConquering the Film and Television Audition, by Kevin Scott AllenFire on Earth, by John and Mary GribbinThe Mammoth Project, by Craig Strete and Terry Izumi