Various tools for writers operated by the ReAnimus Press crew:

Anthopology 101: Reflections, Inspections and Dissections of SF Anthologies, by Bud Webster
In Search of Wonder, by Damon Knight

General:

Footprints on Sand, by L. Sprague de Camp and Catherine Crook de Camp
Galaxy Magazine: The Dark and the Light Years, by David L. Rosheim
The Science Fiction Novel, by Basil Davenport, Robert A. Heinlein, C. M. Kornbluth, Alfred Bester, and Robert BlochThe Craft of Writing Science Fiction that Sells, by Ben BovaHow To Improve Your Speculative Fiction Openings, by Robert QualkinbushThe Issue at Hand, by James Blish (as William Atheling, Jr.)Modern Science Fiction, by Reginald Bretnor, ed.HeinleinOf Worlds Beyond, by Lloyd Arthur Eshbach, ed.Heinlein in Dimension, by Alexei PanshinHaving Relationships With Characters on the Road to Great Fiction, by Andrew BurtStaying Alive - A WriterSpace Travel - A Science Fiction WriterMore Issues at Hand, by James Blish (as William Atheling, Jr.)