When a female agent in Mexico is killed before Helm can complete his mission to extract her, he finds himself teamed up with the woman's sister as he fights to save the lives of a number of scientists and Congressmen.
Murderer's Row
Donald Hamilton
bookThe Devastators
Donald Hamilton
bookThe Menacers
Donald Hamilton
bookMatt Helm - The Revengers
Donald Hamilton
bookThe Retaliators
Donald Hamilton
bookMatt Helm - The Removers
Donald Hamilton
bookMatt Helm The Damagers
Donald Hamilton
bookThe Ambushers
Donald Hamilton
bookMatt Helm: The Ravagers
Donald Hamilton
bookMatt Helm - The Vanishers
Donald Hamilton
bookMatt Helm - The Interlopers
Donald Hamilton
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