When I think of Disch, I think of dry wit, keen intelligence, and perfect prose. He tackled several genres, starting with science fiction (The Puppies of Terra, Camp Concentration, 334), passing through the gothic and historical genres, and concluding with a series of contemporary horror novels (The Businessman, The M.D., The Priest, The Sub) after discovering they paid better. He also wrote poetry, criticism, and the libretto of an opera based on Frankenstein. His masterpiece (selected by Harold Bloom as one of the great American novels of the 20th Century) was the 1979 futuristic allegory, On Wings of Song.
Addendum 7/8 – Disch’s last work, The Word of God: Or, Holy Writ Rewritten (published July 1, 2008), a meta-novel in which Disch imagines himself as God and Philip K. Dick as his spiritual nemesis, is reviewed by John Clute here. The L.A. Times’ obituary is here; the U.K. Guardian’s here.