Book excerpt: While there is literature about the maritime transportation system, and about cyber security, to date there is very little literature on this converging area. This pioneering book is beneficial to a variety of audiences, as a text book in courses looking at risk analysis, national security, cyber threats, or maritime policy; and for practitioners in government and the private sector interested in a clear explanation of the array of cyber risks and potential cyber-defense issues impacting the maritime community (from the back cover).