A number of books that focused more closely on my particular parcel of ground proved very useful, among them Resisting Hitler: Mildred Harnack and the Red Orchestra, by Shareen Blair Brysac; The Haunted Wood, by KGB historians Allen Weinstein and Alexander Vassiliev; and Spies: The Rise and Fall of the KGB in America, by Vassiliev, John Earl Haynes, and Harvey Klehr.
