Fighting Terrorism : Surveillance and Targeted Killing in Post-9/11 World by 
Routledge Handbook of U.S. Counterterrorism and Irregular Warfare Operations by 
Domestic Terrorism by 
Narrating 9/11 by 
Terrorism, Betrayal, and Resilience by 
The Great War of Our Time by 
Isis by Roots of Terrorism Teachers Guide: PBS provides background information and classroom activities on the roots of terrorism.
Global war Issues World101
Combatting Terrorism Center at West Point.
The Investigative Project on Terrorism (IPT) is a non-profit research group founded by Steven Emerson in 1995. It is recognized as the world's most comprehensive data center on radical Islamic terrorist groups.
Types of Terrorism:
State sponsored terrorism: Terrorist acts that occur at the direction, directly, or indirectly of the state or government
Dissent terrorism: dissent groups that use terrorist activities against its own government
Left wing and right wing terrorist: rooted in political ideology, occurs when one ideology dominants a region and they fight over opponents fight to overthrow the government
Religious terrorism: religious ideologies motivate this group. They are one of the most dangerous because they see violence as a divine duty to their religion.
Criminal terrorism: terrorist acts to facilitate crime for profit
Information on FBI's fight against terrorism, definitions, and current threats, and More
US National Counterterrorism Center (NCTC)'s International Terrorism Guide website
A full and complete report on terrorism from the Secretary of State
Research on terrorism from the National Institute of Justice
Documents on topics related to U.S. national security, foreign policy, intelligence, and military history.
RAND conducts a broad array of national security research for the U.S. Department of Defense and allied ministries of defense
United Nations Office on Drugs and Crime
A university-based research and education center comprised of an international network of scholars committed to the scientific study of the causes and human consequences of terrorism in the United States and around the world.
“This research project traces the evolution of militant organizations and the interactions that develop between them over time".
Department of Homeland Security
