Various tools for writers operated by the ReAnimus Press crew:

Space Travel - A Science Fiction Writer
Heinlein in Dimension, by Alexei Panshin

General:

More Issues at Hand, by James Blish (as William Atheling, Jr.)
How To Improve Your Speculative Fiction Openings, by Robert Qualkinbush
The Issue at Hand, by James Blish (as William Atheling, Jr.)The Science Fiction Novel, by Basil Davenport, Robert A. Heinlein, C. M. Kornbluth, Alfred Bester, and Robert BlochStaying Alive - A WriterHaving Relationships With Characters on the Road to Great Fiction, by Andrew BurtModern Science Fiction, by Reginald Bretnor, ed.Footprints on Sand, by L. Sprague de Camp and Catherine Crook de CampSF in Dimension, by Alexei and Cory PanshinAnthopology 101: Reflections, Inspections and Dissections of SF Anthologies, by Bud WebsterIn Search of Wonder, by Damon KnightHeinleinGalaxy Magazine: The Dark and the Light Years, by David L. RosheimOf Worlds Beyond, by Lloyd Arthur Eshbach, ed.