Keys to the Dimensions
1. Land Beyond the Map (1961)
2. The Key to Irunium (1967)
3. The Key to Venudine (1968)
4. The Wizards of Senchuria (1969)
5. The Ships of Durostorum (1970)
6. The Hunters of Jundagai (1971)
7. The Chariots of Ra (1972)
8. The Diamond Contessa (1983)

Hook (writing as Tully Zetford)
1. Whirlpool of Stars (1974)
2. The Boosted Man (1974)
3. Star City (1974)
4. The Virility Gene (1975)

Captain Shark (writing as Richard Silver)
1. By Pirate's Blood (1975)
2. Jaws of Death (1975)

Odan the Half-God (writing as Manning Norvil)
1. Dream Chariots (1977)
2. Whetted Bronze (1978)
3. Crown of the Sword God (1980)

Space Treason (1952) (with A V Clarke)
Cybernetic Controller (1952) (with A V Clarke)
Encounter in Space (1952)
Empire of Chaos (1953)
Galactic Intrigue (1953)
Mission to the Stars (1953) (writing as Philip Kent)
Space Salvage (1953)
The Stars are Ours (1953)
Vassals of Venus (1953) (writing as Philip Kent)
Zhorani: Master of the Universe (1953) (writing as Karl Maras)
Challenge (1954)
Home is the Martian (1954) (writing as Philip Kent)
Peril from Space (1954) (writing as Karl Maras)
Slaves of the Spectrum (1954) (writing as Philip Kent)
World Aflame (1954)
City Under the Sea (1957)
The Secret of ZI (1958)
     aka The Patient Dark
The Changeling Worlds (1959)
Defiance (1960)
The Earth Gods Are Coming (1960)
     aka Of Earth Foretold
White-out (1960) (writing as Ernest Corley)
Beyond The Silver Sky (1961)
No Man's World (1961)
     aka Earth's Long Shadow
The Fatal Fire (1962)
The Wizard of the Starship Poseidon (1963)
Demons' World (1964)
     aka The Demons
The Million Year Hunt (1964)
Behold the Stars (1965)
Worlds for the Taking (1966)
Cycle of Nemesis (1967)
To Outrun Doomsday (1967)
The Doomsday Men (1968)
Kandar (1969)
The Ulcer Culture (1969)
     aka Stained-glass World
The Star Venturers (1969)
Quench the Burning Stars (1970)
     aka Blazon
Star Trove (1970)
Sword of the Barbarians (1970)
The Electric Sword-Swallowers (1971)
The Insane City (1971)
On the Symb-Socket Circuit (1972)
Roller Coaster World (1972)
Stake Out (1978)
Where the Jungle Ends (1978)
Longshot (1978)
Hunter Hunted (1978)
Blind Run (1979)
Fall Girl (1979)
Hiding to Nothing (1980)
No Stone (1981)
Spy Probe (1981)
You'll Be All Right (1982)
Foxhole (1982)
Operation Susie (1982)

New Writings in SF
New Writings in SF 22 (1973)
New Writings in SF 23 (1973)
New Writings in SF 24 (1974)
New Writings in SF 25 (1975)
New Writings in SF 26 (1975)
New Writings in SF 27 (1975)
New Writings in SF Special (1975) (with John Carnell)
New Writings in SF 28 (1976)
New Writings in SF 29 (1976)
New Writings in SF 30 (1977)
New Writings in SF 31 (1977)
New Writings in SF - Special Series (1978)
New Writings in SF 32 (1978)
New Writings in SF 33 (1978)