This site has a brief biography and synopses of all the Matt Helm novels and of some of Hamilton's other novels, as well.

Biography, further reading, and selected bibliography.

Biography and a lengthy overview of Hamilton's work.

A collection of maps that trace the novelistic travels of Donald Hamilton's Matt Helm.

A review of the Matt Helm series by Donald Hamilton.

Donald Hamilton fan page containing news, reviews, and various tidbits about the author and his work.