State of Recovery provides a much needed comprehensive and informed assessment of the role technology and innovation plays among U.S. adversaries in their efforts to undermine U.S. national and international security interests. Zellen further provides an insightful look into what the U.S. is doing, through its own employment of technological means, to combat or circumvent adversarial efforts. Rooted in his exhaustive and astute understanding of this complex issue, his three-dimensional look goes a long ways toward filling a significant void in this body of literature.

Dr. David A. Anderson, Professor of Strategic Studies and William E. Odom Chair of Joint, Interagency and Multinational Operations, U.S. Army Command and General Staff College, Fort Leavenworth, Kansas, US

In our algorithmic age, Zellen focuses on the contributions that technologists working across many disciplines have made in developing a new type of security, filling the vacuum left by those attacks. As in his previous books, the level of analysis is the individual but here with an added dimension: the social networks in which individuals are embedded and lead their lives.

Timothy R. Tangherlini, Professor, Department of Asian Languages and Cultures, UCLA, US

Zellen effectively comingles two important factors, promises of technological advances and engineering security for all Americans in the terrible and long struggle against global terrorism. That American policies and innovative technologies appear to have succeeded in preventing an attack on the homeland for more than a decade provides some comfort, but an insistence prevails that work continue. It is necessary to recognize the complexity and multiplicity of conflict that divides our world into friends as foes. This study will inform and advise us into the future.

Daniel R. Mortensen, PhD, Dean, Air Force Research Institute, Maxwell AFB, AL, US

If you have an addiction for the writings of P.W. Singer on the impact of technology on national security, or Benjamin Sutherland who writes about impact of technology on defense, society, and the economy for The Economist, you will enjoy immersing your mind with Zellen's, State of Recovery. It is a multi-disciplinary look at how technology has changed the United States, her allies and her adversaries, coupled with how the militant Islamist adversary, like al-Qaida, has adapted using technology.

CDR Youssef Aboul-Enein, USN, Adjunct Islamic Studies Chair, National Defense University's Eisenhower School for National Security and Resource Strategy, US

In this wonderfully detailed historical mosaic, Zellen recreates the fascinating but often unsung efforts by thousands of America's technology and policy professionals who worked to restore homeland security after 9/11. Their mission - outsmart a new opponent in this epic struggle that defines our age. A must read for security and technology professionals, and for anyone recalling those darkest of days after the attacks on New York and Washington. It is a tale of overcoming fears, restoring hope and the erasure of America's collective state of despair.

Alan Tidwell, Director, Center for Australian and New Zealand Studies, Edmund A. Walsh School of Foreign Service, Georgetown University, US