The Annihilators
Donald Hamilton
Matt Helm (20)
Assassins Have Starry Eyes
The Betrayers
Matt Helm (10)
The Big Country
Death of a Citizen
Matt Helm (1)
The Detonators
Matt Helm (22)
The Devastators
Matt Helm (9)
The Frighteners
Matt Helm (25)
The Infiltrators
Matt Helm (21)
The Interlopers
Matt Helm (12)
The Intimidators
Matt Helm (15)
The Intriguers
Matt Helm (14)
Matt Helm - the Betrayers
Matt Helm - the Demolishers
Matt Helm - the Devastators
Matt Helm - the Intimidators
Matt Helm - the Retaliators
Murder Twice Told
The Poisoners
Matt Helm (13)
The Ravagers
Matt Helm (8)
The Removers
Matt Helm (3)
The Retaliators
Matt Helm (17)
The Revengers
Matt Helm (19)
The Silencers
Matt Helm (4)
The Terminators
Matt Helm (16)
The Terrorizers
Matt Helm (18)
Texas Fever
The Threateners
Matt Helm (26)
The Vanishers
Matt Helm (23)