The book "Decent Interval" by Frank Snepp is a comprehensive account of the CIA's role in and final departure from the Vietnam War. As the Chief Strategy Analyst in Vietnam, Snepp provides a detailed and insightful perspective on the operations of the CIA inside South Vietnam, as well as high-level disagreements between Washington and Saigon. The book, published in 2002, has been widely praised for its vivid portrayal of the events leading up to the fall of Saigon. With 632 pages, this trade paperback edition is a valuable resource for those interested in intelligence, military history, and international security.