Various tools for writers operated by the ReAnimus Press crew:

Of Worlds Beyond, by Lloyd Arthur Eshbach, ed.
Staying Alive - A Writer

General:

Specific to Smashwords:

The Craft of Writing Science Fiction that Sells, by Ben Bova
Space Travel - A Science Fiction Writer
In Search of Wonder, by Damon KnightAnthopology 101: Reflections, Inspections and Dissections of SF Anthologies, by Bud WebsterHow To Improve Your Speculative Fiction Openings, by Robert QualkinbushMore Issues at Hand, by James Blish (as William Atheling, Jr.)The Issue at Hand, by James Blish (as William Atheling, Jr.)Having Relationships With Characters on the Road to Great Fiction, by Andrew BurtTwice Seven, by Ben BovaTo Make Death Love Us, by Sovereign FalconerJewels of the Dragon, by Allen L. WoldThe Game of Cat and Eagle, by Craig StreteConquering the Film and Television Audition, by Kevin Scott AllenThe Kinsman Saga, by Ben Bova