The Unabomber is the story of the FBI's investigation of Ted Kaczynski, engineer of the most notorious bombing spree in U.S. history, and the agent who helped bring him to justice.

The Unabomber was a lone-wolf terrorist who carried out fourteen bombings that left three people dead and another twenty-three injured. A cunning genius, he dodged his FBI pursuers for nearly two decades, terrifying Americans from coast to coast.

Agent Kathy Puckett, a spy hunter and highly trained psychologist, served as the turning point in the FBI's efforts to understand the mind of the faceless killer. Her insights helped send more than a hundred agents to a remote cabin in the mountains of western Montana on April 3, 1996.

Go behind the scences of some of the FBI's most interesting cases in award-winning journalist Bryan Denson's FBI Files series, featuring the investigations of Russian spy Rick Ames, al-Qaeda member Mohamed Mohamud, and Michael Young's diamong theft ring. Each book includes photographs, a glossary, a note from the author, and other detailed backmatter on the subject of the investigation.