George Washington’s Secret Six by Brian Kilmeade and Don Yaeger
This well researched book looks into one of the first American spy rings. A group of Patriot spies operating in New York City and Long Island during the British occupation. These spies were key in multiple American victories, as well as foiling several British plots against the Patriot forces. These include foiling Benedict Arnold’s plan to hand West Point to the British, and the American victory at Yorktown