Various tools for writers operated by the ReAnimus Press crew:

Of Worlds Beyond, by Lloyd Arthur Eshbach, ed.
In Search of Wonder, by Damon Knight

General:

Modern Science Fiction, by Reginald Bretnor, ed.
Anthopology 101: Reflections, Inspections and Dissections of SF Anthologies, by Bud Webster
Space Travel - A Science Fiction WriterSF in Dimension, by Alexei and Cory PanshinHaving Relationships With Characters on the Road to Great Fiction, by Andrew BurtMore Issues at Hand, by James Blish (as William Atheling, Jr.)How To Improve Your Speculative Fiction Openings, by Robert QualkinbushThe Issue at Hand, by James Blish (as William Atheling, Jr.)Galaxy Magazine: The Dark and the Light Years, by David L. RosheimThe Science Fiction Novel, by Basil Davenport, Robert A. Heinlein, C. M. Kornbluth, Alfred Bester, and Robert BlochHeinlein in Dimension, by Alexei PanshinHeinleinThe Craft of Writing Science Fiction that Sells, by Ben BovaStaying Alive - A Writer