Someone Else's War — Howard R. Simpson

Someone Else's War takes you inside the troubled conscience of Robert Fraser, veteran CIA operative, during the traumatic Tet offensive of 1968. A disillusioned member of the notorious Phoenix program, Fraser has been ordered to kill his longtime friend Arnaud Caze, a French agent suspected of working for the North Vietnamese. Reluctantly, hoping for some sign of Caze's innocence that will reprieve both men, Fraser enters the deadly, subterranean world of Vietnam's shadow war.
As few other writers can, Simpson enables the reader to see, to taste, to smell - to thoroughly experience - exotic Saigon, a city of widespread fear, hopeless love, and casual killing. This tautly written thriller will leave you stunned as it reveals how the war in Vietnam drained its participants of feeling - as it became Someone Else's War.