Power Plays
1. Politika (1997) (with Tom Clancy)
2. Ruthless.Com (1998) (with Tom Clancy)
3. Shadow Watch (1999) (with Tom Clancy)
4. Bio-Strike (2000) (with Tom Clancy)
7. Zero Hour (2003) (with Tom Clancy and Jerome Preisler)

SSN (1996) (with Tom Clancy)
The Angel Is Near (2004) (with Deepak Chopra)

The Mammoth Book of ...
The Mammoth Book of Short Crime Novels (1986) (with Bill Pronzini)
The Mammoth Book of Short Spy Novels (1986) (with Bill Pronzini)
The Mammoth Book of Private Eye Stories (1988) (with Bill Pronzini)
The Mammoth Book of Golden Age Science Fiction: Short Novels of the 1940s (1989) (with Isaac Asimov and Charles G Waugh)
The Mammoth Book of World War II Stories (1989) (with Bill Pronzini)
The Mammoth Book of Modern Science Fiction: Short Novels of the 1980s (1993) (with Isaac Asimov and Charles G Waugh)
The Mammoth Book of Fantasy All-Time Greats (1998) (with Robert Silverberg)
     aka The Fantasy Hall of Fame

Isaac Asimov Presents the Great SF Stories (with Isaac Asimov)
1. The Great SF Stories One: 1939 (1979)
2. The Great SF Stories Two: 1940 (1979)
3. The Great SF Stories 3: 1941 (1980)
4. The Great SF Stories 4: 1942 (1980)
5. The Great SF Stories 5: 1943 (1981)
6. The Great SF Stories 6: 1944 (1981)
7. The Great SF Stories 7: 1945 (1982)
8. The Great SF Stories 8: 1946 (1982)
9. The Great SF Stories 9: 1947 (1983)
10. The Great SF Stories 10: 1948 (1983)
11. The Great SF Stories 11: 1949 (1984)
12. The Great SF Stories 12: 1950 (1984)
13. The Great SF Stories 13: 1951 (1985)
14. The Great SF Stories 14: 1952 (1985)
15. The Great SF Stories 15: 1953 (1986)
16. The Great SF Stories 16: 1954 (1986)
17. The Great SF Stories 17: 1955 (1987)
18. The Great SF Stories 18 (1986)
19. The Great SF Stories 19: 1957 (1989)
20. The Great SF Stories 20 (1990)
22. The Great SF Stories 22 (1991)
23. The Great SF Stories 23 (1991)
24. The Great SF Stories 24 (1992)
25. The Great SF Stories 25 (1992)

Isaac Asimov's Magical Worlds of Fantasy
1. Wizards (1983) (with Isaac Asimov and Charles G Waugh)
2. Witches (1984) (with Isaac Asimov)
3. 3 Cosmic Knights (1985) (with Isaac Asimov)
4. Spells (1985) (with Isaac Asimov)
5. Giants (1985) (with Isaac Asimov)
6. Mythical Beasties (1983) (with Isaac Asimov)
7. Magical Wishes (1986) (with Isaac Asimov)
8. Devils (1987)
9. Atlantis (1988) (with Isaac Asimov and Charles G Waugh)
10. Ghosts (1984) (with Isaac Asimov)
11. Curses (1989) (with Isaac Asimov and Charles G Waugh)
12. Faeries (1991) (with Isaac Asimov and Charles G Waugh)

Isaac Asimov's Wonderful Worlds of Science Fiction
1. Intergalactic Empires (1983) (with Isaac Asimov and Charles G Waugh)
2. The Science Fictional Olympics (1984) (with Isaac Asimov and Charles G Waugh)
3. Supermen (1984) (with Isaac Asimov and Charles G Waugh)
4. Comets (1986) (with Isaac Asimov and Charles G Waugh)
5. Tin Stars (1986) (with Isaac Asimov and Charles G Waugh)
6. Neanderthals (1987) (with Isaac Asimov, Robert Silverberg and Charles G Waugh)
7. Space Shuttles (1987) (with Isaac Asimov and Charles G Waugh)
9. Robots (1988) (with Isaac Asimov and Charles G Waugh)
10. Invasions (1990) (with Isaac Asimov)

Young...
Young Extraterrestrials (1984) (with Isaac Asimov)
Young Mutants (1984) (with Isaac Asimov and Charles G Waugh)
Young Star Travelers (1986) (with Isaac Asimov and Charles G Waugh)
Young Witches and Warlocks (1987) (with Isaac Asimov)

Civil War Women (with Frank D McSherry and Charles G Waugh)
1. Civil War Women: The Civil War Seen Through Women's Eyes in Stories by Louisa May Alcott, Kate Chopin, Eudora Welty, and Other Great Women Writers (1988)
2. Civil War Women II: Stories by Women About Women (1997)

Catfantastic (with Andre Norton)
Catfantastic: Nine Lives and Fifteen Tales (1989)
Catfantastic II (1990)
Catfantastic III (1994)
Catfantastic IV (1996)
Catfantastic V (1999)

Murder Most...
Murder Most Sacred: Great Catholic Tales of Mystery and Suspense (1989) (with Edward D Hoch)
Murder Most Medieval: Noble Tales of Ignoble Demises (1993) (with John Helfers)
Murder Most Delicious (1995)
Murder Most Medical (1995) (with Cathleen Jordan and Cynthia Manson)
Murder Most Irish (1996) (with Michael Jahn)
Murder Most Divine (2000) (with Ralph McInerny)
Murder Most Delectable: Savory Tales of Culinary Crimes (2001)
Murder Most Feline: Cunning Tales of Cats and Crime (2001) (with Ed Gorman and Larry Segriff)
Murder Most Postal (2001) (with Mike Towle)
Murder Most Romantic: Passionate Tales of Life and Death (2001) (with Denise Little)
Murder Most Celtic (2003)
Murder Most Confederate (2003)

New Hugo Winners
1. New Hugo Winners: Award Winning Science Fiction Stories (1989)

New Frontiers (with Bill Pronzini)
1. New Frontiers Vol. 1 (1989)
2. New Frontiers Vol. 2 (1990)

Isaac Asimov's Universe
1. The Diplomacy Guild (1990)
2. Phases in Chaos (1991)
3. Unnatural Diplomacy (1992)

Cat Crimes
Cat Crimes I (1991) (with Ed Gorman)
Cat Crimes II: Masters of Mystery Present More Tales of the Cat (1992) (with Ed Gorman)
Cat Crimes III (1992) (with Ed Gorman)
Cat Crimes for the Holidays (1995) (with Ed Gorman and Larry Segriff)
Cat Crimes Takes a Vacation (1995) (with Ed Gorman)
Cat Crimes Through Time (1998) (with Ed Gorman and Larry Segriff)

Fantastic
Horse Fantastic (1991) (with Rosalind M Greenberg)
Dragon Fantastic (1992) (with Rosalind M Greenberg)
Dinosaur Fantastic (1993) (with Mike Resnick)
Witch Fantastic (1994) (with Mike Resnick)
Fantastic Alice (1995) (with Margaret Weis)
Castle Fantastic (1996) (with John DeChancie)
Tarot Fantastic (1997) (with Lawrence Schimel)
Wizard Fantastic (1997)
Zodiac Fantastic (1997) (with A R Morlan)
Camelot Fantastic (1998) (with Lawrence Schimel)
Civil War Fantastic (2000)
Spell Fantastic (2000) (with Larry Segriff)
Warrior Fantastic (2000) (with John Helfers)
Assassin Fantastic (2001) (with Alexander Potter)
Knight Fantastic (2002) (with John Helfers)
Pharaoh Fantastic (2002) (with Brittany A Koren)

My Favorite Story
My Favorite Fantasy Story (1994)
My Favorite Science Fiction Story (1999)
My Favorite Horror Story (2000) (with Mike Baker)

Sisters in Fantasy (with Susan Shwartz)
1. Sisters in Fantasy (1995)
2. Sisters in Fantasy 2 (1996)

Chicks in Chainmail (with Esther Friesner)
3. Chicks 'n Chained Males (1999)
4. The Chick Is in the Mail (2000)

Price of Freedom
1. The Price of Freedom: Slavery and the Civil War Vol 1 (2000) (with Edna Greene Medford)
2. The Price of Freedom Volume 2 (2000)

...Beginnings (with Steven H Silver)
Horrible Beginnings (2003)
Magical Beginnings (2003)
Wondrous Beginnings (2003)

American Government Through Science Fiction (1974) (with Joseph Olander and Patricia S Warrick)
Introductory Psychology Through Science Fiction (1974) (with Harvey A Katz and Patricia S Warrick)
The New Awareness: Religion Through Science Fiction (1975) (with Patricia S Warrick)
The City 2000 A. D.: Urban Life Through Science Fiction (1976) (with Ralph Clem and Joseph Olander)
100 Great Science Fiction Short Short Stories (1978) (with Isaac Asimov and Joseph Olander)
International Relations Through SF (1978)
Science Fiction of the Fifties (1979) (with Joseph Olander)
Dawn of Time: Prehistory Through Science Fiction (1979) (with Joseph Olander and Robert Silverberg)
Car Sinister (1979) (with Robert Silverberg)
The Science Fictional Solar System (1979) (with Isaac Asimov and Charles G Waugh)
Neglected Visions (1979) (with Barry N Malzberg and Joseph Olander)
The Seven Deadly Sins of Science Fiction (1980) (with Isaac Asimov and Charles G Waugh)
The Future in Question (1980) (with Isaac Asimov and Joseph Olander)
Microcosmic Tales (1980) (with Isaac Asimov and Joseph Olander)
Space Mail (1980) (with Isaac Asimov and Charles G Waugh)
Future I: Short Stories (1980) (with Isaac Asimov and Charles G Waugh)
A Century of Science Fiction 1950-1959 (1981) (with Robert Silverberg)
The Giant Book of Horror Stories (1981) (with Barry N Malzberg and Bill Pronzini)
Great Tales of Mystery and Suspense (1981) (with Barry N Malzberg and Bill Pronzini)
A Treasury of Modern Fantasy (1981) (with Terry Carr)
The Arbor House Treasury of Horror and the Supernatural (1981) (with Barry N Malzberg and Bill Pronzini)
First Voyages (1981) (with Damon Knight and Joseph Olander)
Catastrophes! (1981) (with Isaac Asimov and Charles G Waugh)
Isaac Asimov Presents the Best Science Fiction of the 19th Century (1981) (with Isaac Asimov and Charles G Waugh)
Seven Cardinal Virtues of Science Fiction (1981) (with