Print and Digital Books
The Matt Helm novels and other fiction by Donald Hamilton published by Titan Books are available in print and digital formats.
The Matt Helm novels are being published as audiobooks by Skyboat Media, read by Stefan Rudnicki.
A little more info about the Matt Helm audiobooks. There seem to be as many as four versions of each audiobook.
An unabridged short story The Guns of William Longley by Donald Hamilton is included in the audio collection The Greatest Western Stories of the 20th Century edited by Martin Greenberg.
Some of the movies based on Donald Hamilton's novels are available to stream from Amazon. Some may also available on DVD or Blu-Ray.
The Violent Men
Five Steps to Danger
The Big Country