Military Technology: Top Secret Clearance: Military Jets Up Close
Campaigning for President in America, 1788-2016
Encyclopedia of Historical Warrior Peoples & Modern Fighting Groups
Military Technology: Top Secret Clearance: Warplanes of World War II Up Close
Presidential Power: Documents Decoded
Military Technology: Top Secret Clearance: Tanks of World War II Up Close
The Gun Debate: An Encyclopedia of Gun Rights & Gun Control in the United States
Military Technology: Top Secret Clearance: Modern Warships Up Close
Military Technology: Top Secret Clearance: Small Arms Up Close
The CQ Press Guide to U.S. Elections
Economics in the 21st Century: Taxes: What They Are and How They Work
The Central Intelligence Agency: An Encyclopedia of Covert Ops, Intelligence Gathering, and Spies
Illegal Immigration: A Reference Handbook
Instruments of War: Weapons and Technologies That Have Changed History
Government and the Economy: An Encyclopedia
When Should State Secrets Stay Secret?: Accountability, Democratic Governance, and Intelligence
Diplomacy and the Making of World Politics