Messiah Stone
1. The Messiah Stone (1986)
2. The Dark Messiah (1990)

The Long Night (1956)
Race for the Moon (1960)
Black Thursday (1960)
Red Star in Space (1963)
Marooned (1964)
Devil Take All (1966)
The Last Fathom (1967)
No Man's World (1967)
Four Came Back (1968)
The God Machine (1969)
Anytime, Anywhere (1970)
Ballantine Inactive (1970)
The Cape (1971)
The Mendelov Conspiracy (1971)
     aka Encounter Three
Almost Midnight (1971)
Maryjane Tonight at Angels Twelve (1972)
The Last Dogfight (1974)
Planetfall (1974)
Three Corners to Nowhere (1975)
Whip (1976)
Aquarius Mission (1978)
Jericho 52 (1979)
Wingborn (1979)
Manfac (1979)
Night Hamburg Died (1979)
The Final Countdown (1980)
Tigers Are Burning (1980)
Deathmate (1982)
Killer Station (1984)
Star Bright (1984)
Zoboa (1986)
Exit Earth (1987)
Beamriders! (1989)
Prison Ship (1989)
Natural or Supernatural? (1997)
The B-17: the Flying Fortress (2001)

Cyborg
1. Cyborg (1972)
2. Operation Nuke (1973)
3. High Crystal (1974)
4. Cyborg IV (1975)

Indiana Jones
7. Indiana Jones and the Sky Pirates (1993)
8. Indiana Jones and the White Witch (1994)

Rockets and Missiles, Past And Future (1954) (with David C Cooke)
Worlds in Space (1954)
Rockets Beyond the Earth (1955)
Air Force (1957)
Boeing 707 (1959)
A Torch to the Enemy (1960)
Test Pilot (1961)
Aviation and Space Medicine: Man Conquers the Vertical Frontier (1962)
Rendezvous in space: The story of Projects Mercury, Gemini, Dyna-Soar and Apollo (1962)
By Apollo to the Moon (1963)
Flying: Principles of Flight and the Development of Aircraft (1963)
The Long Arm of America: The story of the amazing Hercules air assault transport and our revolutionary global strike forces (1963)
The Man-in-space Dictionary (1963)
Everything But The Flak: A Crazy Ride Across the Atlantic in Three Antiquated B-17's (1964)
The Mighty Hercules (1964)
The Silken Angels: A History of Parachuting (1964)
Barnstorming: The Great Years of Stunt Flying (1965)
The Ragged, Rugged Warriors (1966)
Flying Forts: The B-17 in World War II (1968)
Me 109: Willy Messerschmitt's peerless fighter (1968)
Zero Fighter (1969)
Zero!: The Story of Japan's Air War in the Pacific - As Seen by the Enemy (1971) (with Jiro Horikoshi and Masatake Okumiya)
Destination Mars: In Art, Myth, and Science (1972) (with Jay Barbree)
When War Comes (1972)
Golden Wings: A Pictorial History of the United States Navy and Marine Corps in the Air (1972)
Bicycles in War (1974) (with Jay Barbree)
The Saga of Iron Annie (1979)
Kill Devil Hill (1979) (with Harry Combs)
Thunderbolt: The P-47 (1983) (with Robert S Johnson)
Ragwings and Heavy Iron: The Agony and the Ecstasy of Flying History's Greatest Warbirds (1984)
Samurai!: The Autobiography of Japan's Bravest Fighter Ace (1985) (with Saburo Sakai)
Fork-tailed Devil: The P38 (1990)
Thunderbolt: The Fabulous U.S. 56th Fighter Group (1990)
Ghosts of the Air (1991)
Pioneer Bush Pilot: Story of Noel Wien (1991)
Test Pilots: Riding the Dragon (1992)
A Journey Through Time: Exploring the Universe With the Hubble Space Telescope (1995) (with Jay Barbree)