Homeland Security Technologies for the 21st Century
The Roots and Consequences of 20th-Century Warfare: Conflicts That Shaped the Modern World
Military Technology: Top Secret Clearance: Warplanes of World War II Up Close
Military Technology: Top Secret Clearance: Modern Warships Up Close
Military Technology: Top Secret Clearance: Small Arms Up Close
Campaigning for President in America, 1788-2016
Economics in the 21st Century: Taxes: What They Are and How They Work
The CQ Press Guide to U.S. Elections
Presidential Power: Documents Decoded
Military Technology: Top Secret Clearance: Military Jets Up Close
Instruments of War: Weapons and Technologies That Have Changed History
Diplomacy and the Making of World Politics
9/11 and the War on Terror: A Documentary and Reference Guide
Cyber Warfare: A Reference Handbook
Border Disputes: A Global Encyclopedia
Illegal Immigration: A Reference Handbook