Spy Sites of Philadelphia: A Guide to the Region's Secret History (Paperback) (ISBN-13: 9781647120177)

H. Keith Melton is an internationally recognized intelligence historian and authority on espionage technology. He is the author of Ultimate Spy: Inside the Secret World of Espionage and coauthor of Spycraft: The Secret History of the CIA's Spytechs, from Communism to Al-Qaeda with Robert Wallace. Keith and Robert are executive producers of the Netflix series Spycraft, loosely based on their book by the same name.

Robert Wallace is the former director of the Central Intelligence Agency's Office of Technical Service, founder of the Artemus Consulting Group, and contributor to the CIA's Center for the Study of Intelligence. He has coauthored numerous books with H. Keith Melton, including Spy Sites of Washington, DC and Spy Sites of New York City. Robert and Keith are executive producers of the Netflix series Spycraft, loosely based on their book by the same name.

Henry R. Schlesinger is a New York-based writer who has collaborated with the authors on several books, including Spycraft, Spy Sites of Washington, DC and Spy Sites of New York City.