Craig Dirgo is an American author of techno thrillers and adventure novels, as well as non-fiction. He started off co-authoring with Clive Cussler on his non-fiction work. He soon moved to his own novels starring his character, John Taft, an agent of a fictitious US spy agency, the National Intelligence Agency. He co-authored with Cussler the first two "Oregon Files" novels.
He is also a trustee of Cussler's National Underwater and Marine Agency group.