Various tools for writers operated by the ReAnimus Press crew:

Of Worlds Beyond, by Lloyd Arthur Eshbach, ed.
Space Travel - A Science Fiction Writer

General:

Modern Science Fiction, by Reginald Bretnor, ed.
The Science Fiction Novel, by Basil Davenport, Robert A. Heinlein, C. M. Kornbluth, Alfred Bester, and Robert Bloch
Staying Alive - A WriterFootprints on Sand, by L. Sprague de Camp and Catherine Crook de CampSF in Dimension, by Alexei and Cory PanshinThe Issue at Hand, by James Blish (as William Atheling, Jr.)Anthopology 101: Reflections, Inspections and Dissections of SF Anthologies, by Bud WebsterGalaxy Magazine: The Dark and the Light Years, by David L. RosheimHeinlein in Dimension, by Alexei PanshinIn Search of Wonder, by Damon KnightThe Craft of Writing Science Fiction that Sells, by Ben BovaHow To Improve Your Speculative Fiction Openings, by Robert QualkinbushHaving Relationships With Characters on the Road to Great Fiction, by Andrew BurtMore Issues at Hand, by James Blish (as William Atheling, Jr.)