Biography
Works
Indiana Jones and the White Witch
1994
Zoboa
1986
The last fathom (Pinnacle Books)
1974
Operation Nuke
1973
When war comes
1972
Fork-Tailed Devil
1971
Almost midnight
1971
Anytime, anywhere
1969
No man's world
1967
The ragged, rugged warriors
1966
Wings into space
1964
The mighty Hercules
1964
By Apollo to the moon
1963
The man-in-space dictionary
1963
Overture to space
1963
Red star in space
1963
Rendezvous in space
1962
Man into space
1961
Black Thursday
1960
The astronauts
1960
Golden wings
1960
War for the moon
1959
Air Force (Perennial Works in Sociology)
1957
Rockets and missiles, past and future
1954
Cyborg IV
Cyborg
Beamriders
Devil take all
High crystal
Whip
Aquarius mission
Wingborn
Marooned
The Mendelov conspiracy
Star bright
Three corners to nowhere
Killer station
Indiana Jones and the sky pirates
Thunderbirds
Der korrigierte Mensch - SF-Roman
High Crystal (Martin Caidin) / The Naked Sun (Isaac Asimov)
ME-109
Mendelov Conspiracy
Destination Mars
Thunderbolt!
Indiana Jones et la sorcière blanche
Samurai
Night Hamburg Died, The
1990
The saga of Iron Annie
1979
Me 109
1973
Maryjane tonight at Angels Twelve
1972
Zero fighter
1970
Me 109; Willy Messerschmitt's peerless fighter
1968
The night Hamburg died
1966
Wagnis ohne beispiel
1965
Hydrospace
1964
Marooned a Novel
1964
Test pilot
1961
Race for the moon
1960
Let's go flying!
1960
Spaceport, U. S. A
1959
The long night
1956
The last fathom
Le diable l'emporte
The last dogfight
The silken angels
Barnstorming
The B-17: The Flying Forts
Beamriders!
The final countdown
Encounter three
Fork-Tailed Devil: The P-38
Jericho 52
Marooned (Revised edition)
ZERO!
Thunderbolt
Zero
Countdown for tomorrow