Among the last CIA agents airlifted from Saigon in the waning moments of the Vietnam War, Frank Snepp returned to headquarters determined to secure help for the Vietnamese left behind by an Agency eager to cut its losses. What he received instead was a cold shoulder from a CIA that in 1975 was already in turmoil over congressional investigations of its operations throughout the world.

In protest, Snepp resigned to write a damning account of the agency's cynical neglect of its onetime allies and inept handling of the war. His expose, Decent Interval, was published in total secrecy,...

Widely regarded as a classic on the Vietnam War, Decent Interval provides a scathing critique of the CIA's role in and final departure from that conflict. Still the most detailed and respected account of America's final days in Vietnam, the book was written at great risk and ultimately at great sacrifice by an author who believed in the CIA's cause but was disillusioned by the agency's treacherous withdrawal, leaving thousands of Vietnamese allies to the mercy of an angry enemy. A quarter-century later, it remains a riveting and powerful testament to one of the darkest episodes in American...