Jerry Ahern is a science fiction

Science fiction

Science fiction is a genre of fiction dealing with imaginary but more or less plausible content such as future settings, futuristic science and technology, space travel, aliens, and paranormal abilities...

 and action novel author best known for his post apocalyptic survivalist series The Survivalist

The Survivalist

The Survivalist is the generic title of Jerry Ahern's long-lived series of pulp novels. While he was pre-dated by six years by the novel The Survivalist by Giles Tippette Ahern was the first novelist to create a series of novels with an iconic central character with distinctive survivalist...

. The books in this series are heavy with descriptions of the weapons the protagonists use to survive and prosecute a seemingly never-ending war amongst the remnants of the superpowers from pre-apocalypse times. The series centers around the attempts of Dr. John Thomas Rourke, an ex-CIA

Central Intelligence Agency

The Central Intelligence Agency is a civilian intelligence agency of the United States government. It is an executive agency and reports directly to the Director of National Intelligence, responsible for providing national security intelligence assessment to senior United States policymakers...

 agent, to preserve his family.