The Irregulars, Jennet Connant (2008) — Connant tells the interesting story of English agents in Washington D.C. before and during World War II. More gentlemanly than spies would later become, they included the authors Roald Dahl and Ian Fleming. This is largely about Dahl, an airman shot down early in the war who served his country by socializing with some of America’s leading figures.
NYT review here.