That was the note handed to flight attendant Florence Schaffner by a mild-mannered passenger now known as D. B. Cooper on a Northwest Orient flight in 1971. It was also the start of one of the most astonishing aviation whodunits in the history of American true crime: how one man extorted $200,000 from an airline before parachuting into the wilds of the Pacific Northwest, never to be seen again.

The case of D. B. Cooper is a modern legend that has obsessed and cursed his pursuers for generations with everything from bankruptcy to suicidal despair. Now, with Skyjack, Geoffrey Gray obtains a first-ever look at the FBI's confidential Cooper file, uncovering new leads in the infamous case.

Starting with a crack tip from a private investigator, Gray plunges into the murky depths of the decades-old mystery to chase down new clues and explore secrets of the case's most prominent suspects, including Ralph Himmelsbach, the most dogged of FBI agents, who watched with horror as a criminal became a counter-culture folk hero; Karl Fleming, a respected reporter whose career was destroyed by a D. B. Cooper scoop that was a scam; and Barbara Dayton, a transgender pilot who insisted she was Cooper herself. With explosive new information, Skyjack reopens one of the great cold cases of the twentieth century.