In this true story with the pacing of a thriller, Pulitzer Prize finalist Annie Jacobsen unveils the Special Activities Division (SAD), the world's most effective black operations force and a highly classified branch of the CIA. SAD conducts high-risk operations that defend America from its enemies, including targeted assassinations. Jacobsen gained unprecedented access to 42 men and women of SAD, people who worked in treacherous environments around killers and saboteurs. Despite the moral questions surrounding paramilitary and intelligence work, every operation reported here is legal.