In 1965, 22-year-old Paul Letersky was assigned to assist FBI Director J. Edgar Hoover, a notoriously private man. Through his close working relationship with Hoover, and the trust and confidence he gained from Hoover's loyal senior assistant Helen Gandy, Letersky became one of the few able to enter the director's secretive, sometimes perilous world.

"A fascinating and long overdue look…. Letersky takes you deep inside the psyche of the man who knew all the secrets and played them like a card shark."—Tom Brokaw