Donald Hamilton

The Detonators, published in 1985, is a novel in the long-running secret agent series Matt Helm by Donald Hamilton.

The Infiltrators was the twenty-first novel in the spy series Matt Helm by Donald Hamilton. It was first published in 1984.

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 Intriguers, first published in 1972, was the fourteenth novel in the Matt Helm spy series by Donald Hamilton.