Donald Hamilton

The Silencers is the title of a 1962 spy novel by Donald Hamilton, the fourth in a series of books featuring assassin Matt Helm.

The Interlopers, first published in 1969, was the twelfth novel in the Matt Helm spy series by Donald Hamilton, which began in 1960. It represents a middle period in the Helm novels, being about 80,000 words in length, somewhat longer than the first four or five in the series, but considerably shorter than most of the …

The Removers is a spy novel by Donald Hamilton first published in 1961. It was the third novel featuring Hamilton's creation, counter-agent and assassin Matt Helm.