Various tools for writers operated by the ReAnimus Press crew:

Space Travel - A Science Fiction Writer
Having Relationships With Characters on the Road to Great Fiction, by Andrew Burt

General:

Specific to Smashwords:

In Search of Wonder, by Damon Knight
The Issue at Hand, by James Blish (as William Atheling, Jr.)
More Issues at Hand, by James Blish (as William Atheling, Jr.)Anthopology 101: Reflections, Inspections and Dissections of SF Anthologies, by Bud WebsterHow To Improve Your Speculative Fiction Openings, by Robert QualkinbushThe Craft of Writing Science Fiction that Sells, by Ben BovaStaying Alive - A WriterOf Worlds Beyond, by Lloyd Arthur Eshbach, ed.The Story of Light, by Ben BovaThe Mars Monopoly, by Jerry SohlSafecracking, by Richard ByrneThe Last Hurrah of the Golden Horde, by Norman SpinradStar God, by Allen L. WoldShadrach in the Furnace, by Robert Silverberg