Various tools for writers operated by the ReAnimus Press crew:

Of Worlds Beyond, by Lloyd Arthur Eshbach, ed.
The Issue at Hand, by James Blish (as William Atheling, Jr.)

General:

Heinlein in Dimension, by Alexei Panshin
Having Relationships With Characters on the Road to Great Fiction, by Andrew Burt
Anthopology 101: Reflections, Inspections and Dissections of SF Anthologies, by Bud WebsterThe Science Fiction Novel, by Basil Davenport, Robert A. Heinlein, C. M. Kornbluth, Alfred Bester, and Robert BlochHow To Improve Your Speculative Fiction Openings, by Robert QualkinbushThe Craft of Writing Science Fiction that Sells, by Ben BovaSF in Dimension, by Alexei and Cory PanshinStaying Alive - A WriterModern Science Fiction, by Reginald Bretnor, ed.Footprints on Sand, by L. Sprague de Camp and Catherine Crook de CampGalaxy Magazine: The Dark and the Light Years, by David L. RosheimSpace Travel - A Science Fiction WriterHeinleinIn Search of Wonder, by Damon Knight