The Homeland Security Digital Library (HSDL) is the nation’s premier collection of documents related to homeland security policy, strategy, and organizational management. The HSDL is sponsored by the U.S. Department of Homeland Security’s National Preparedness Directorate, FEMA and the Naval Postgraduate School Center for Homeland Defense and Security. Resources in the Homeland Security Digital Library cover a wide range of homeland security topics and are carefully selected and evaluated by a team of librarians and content specialists. Sources include, but are not limited to:

Federal, state and local governments
International governments and institutions
Nonprofit organizations and private sector entities
Think tanks, research centers, colleges and universities