Hat tip to: The Marine Advocate Online.
You can order Defending Against Pirates here for $75 (downloadable pdf) or as a more expensive hard copy.
You might also be interested in a book to which I contributed,
Maritime Private Security
Market Responses to Piracy, Terrorism and Waterborne Security Risks in the 21st Century
Edited by Patrick Cullen and Claude Berube, available here or from Amazon here.