The encyclopedia includes hundreds of entries in chronologically organized sections that cover espionage by and within the United States from colonial times to the 21st century. Entries cover key individuals, technologies, and events in the history of American espionage. Volume two offers overviews of important agencies in the American intelligence community and intelligence organizations in other nations (both allies and adversaries), plus details of spy trade techniques, and a concluding section on the portrayal of espionage in literature and film. The result is a cornerstone resource that moves beyond the Cold War-centric focus of other works on the subject to offer an authoritative contemporary look at American espionage efforts past and present.