- Moscow’s Mercenaries: The Rise and Fall of the Wagner Group
- Terrorism, Inc.: The Financing of Terrorism, Insurgency, and Irregular Warfare
- After the Caliphate: The Islamic State & the Future Terrorist Diaspora
- Mexico Is Not Colombia: Alternative Historical Analogies for Responding to the Challenge of Violent Drug-Trafficking Organizations
- Moscow’s Mercenaries: The Rise and Fall of the Wagner Group (Columbia Studies in Terrorism and Irregular Warfare)





















