The Silencers
Helm is sent to extract a female agent working as a stripper in a bar in Mexico. When she 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 group of scientists and American officials. Perhaps the most famous of the titles, due to the Dean Martin film of the same name, but where the movies were tongue-in-cheek, the novels are breathtakingly brutal.
Donald Hamilton
Donald Hamilton was a U.S. writer of novels, short stories, and non-fiction about the outdoors. His novels consist mostly of paperback originals, principally spy fiction but also crime fiction and Westerns such as The Big Country. He is best known for his long-running Matt Helm series (1960-1993), which chronicles the adventures of an undercover counter-agent/assassin working for a secret American government agency.
Hamilton began his writing career in 1946, fiction magazines like Collier's Weekly and The Saturday Evening Post. His first novel Date With Darkness was published in 1947; over the next forty-six years he published a total of thirty-eight novels. Most of his early novels whether suspense, spy, and western published between 1954 and 1960, were typical paperback originals of the era: fast-moving tales in paperbacks with lurid covers. Several classic western movies, The Big Country and The Violent Men, were adapted from two of his western novels.
Matt Helm
Matt Helm consists of twenty-seven books. The current recommended reading order for the series is provided below.

