Annwn
1. Druids' World (1967)
2. Witch Queen of Lochlann (1969)
3. Kar Kaballa (1969)
4. Second War of the Worlds (1979)
5. The Island Snatchers (1978)

A Place Named Hell (writing as M J Deer)
The Psycho Makers (writing as Jerry Jason)
Those Sexy Saucer People (writing as Jan Hudson)
The Gorgeous Devil (1959)
Whip Of Passion (1959)
Hot Stuff (1960)
Huge Hunger (1960)
Swamp Bred (1960)
Baroness of Blood (1961)
Virgin Mistress (1961)
     aka The Coming of the Rats
Love Cult (1961) (writing as Jan Hudson)
Scourge of the Blood Cult (1961)
Private Hell (1962)
Swamp Lust (1962)
Erotic Orgy (1962)
Doomsday Wing (1963)
Flames of Desire (1963) (writing as M J Deer)
Sexodus! (1963) (writing as Jerry Jason)
The Unending Night (1964)
The Forgotten Planet (1965)
The Four Day Weekend (1966)
The Sex and Savagery of Hell's Angels (1967) (writing as Jan Hudson)
The New Barbarians (1973) (writing as Jan Hudson)
Bikers at War (1976) (writing as Jan Hudson)
Sweetgrass (1983) (writing as Jan Hudson)
NYPD 2025 (1985) (writing as Hal Stryker)

A Galaxy Trilogy (2007) (with Poul Anderson, Stanton A Coblentz)