“The Age of Invention ” F&SF Jul 1966
Agent of Chaos novel Belmont, 1967
“The Big Flash ” short fiction Orbit 5, 1969
Bug Jack Barron novel Walker, 1969
“Carcinoma Angels ” Dangerous Visions, 1967
Child of Fortune novel Bantam Spectra, 1985
“Deathwatch ” Playboy Nov 1965
Deus X novella Bantam Spectra, 1993
“The Equalizer ” Analog Dec 1964
Greenhouse Summer novel Tor, 1999
“The Helping Hand ” Full Spectrum 3, 1991
The Iron Dream novel Avon , 1972
“Journals of the Plague Years ” short fiction Full Spectrum, 1988
“The Last Hurrah of the Golden Horde” New Worlds Jul 1969
The Last Hurrah of the Golden Horde collection Nelson Doubleday/SFBC, 1970
“The Last of the Romany ” Analog May 1963
Little Heroes novel Bantam Spectra, 1987
“The Lost Continent ” Science Against Man, 1970
The Men in the Jungle novel Doubleday , 1967
Modern Science Fiction anthology Anchor, 1974
“The National Pastime ” Nova 3, 1973
“New Ice Age, or Just Cold Feet? ” Nature Jun 8 2000
“No Direction Home ” New Worlds Quarterly 2, 1971
No Direction Home collection Pocket, 1975
Other Americas collection Bantam Spectra, 1988
The People's Police novel Tor, 2017
Pictures At 11 novel Bantam, 1994
“Prime Time ” short fiction Omni Nov 1980
“Riding the Torch ” short fiction Threads of Time, 1974
Russian Spring novel Bantam Spectra, 1991
“Sierra Maestra ” short fiction Analog Oct 1975
Songs from the Stars novel Simon & Schuster, 1980
Star Trek: “The Doomsday Machine”
The Star-Spangled Future collection Ace, 1979
Staying Alive: A Writer's Guide nonfiction Donning, 1983
“Street Meat ” short fiction Asimov's mid-Dec 1983
“Subjectivity ” Analog Jan 1964
“A Thing of Beauty ” short fiction Analog Jan 1973
Vampire Junkies short fiction Tomorrow Speculative Fiction, 1993
“La Vie Continué” short fiction Other Americas, 1988
The Void Captain's Tale novel Timescape, 1983
“The Weed of Time ” Alchemy & Academe, 1970
“What Eats You ” short fiction Asimov's Jul 1991
A World Between novel Pocket, 1979
“World of Gray ” Demon Kind, 1973
“World War Last ” short fiction Asimov's Aug 1985; After the Flames
“The Year of the Mouse ” short fiction Asimov's Apr 1998