From Lis Wiehl, New York Times bestselling author and "storyteller extraordinaire" (Steve Berry), with New York Times bestselling crime writer Lisa Pulitzer, the definitive, gripping account of the longest pursuit in FBI history: the quest to find and capture the domestic terrorist Ted Kaczynski

On April 3, 1996, a team of FBI agents closed in on an isolated cabin in remote Montana, marking the end of the longest and most expensive investigation in FBI history. The cabin's lone inhabitant was a former mathematics prodigy and wunderkind professor who had abandoned society decades earlier. Few people knew his name, Theodore Kaczynski, but everyone knew the mayhem and death associated with his nickname: the Unabomber.

For two decades, Kaczynski had masterminded a campaign of random terror, killing and maiming innocent people through bombs sent in untraceable packages. The FBI task force charged with finding the perpetrator of these horrifying crimes...