Today we talked to Blake Mobley about his new book Terrorism and Counter-Intelligence: How Terrorist Groups Elude Detection (Columbia University Press, 2012). There have been many books examining the intelligence operations of counter-terrorist agencies. Also there are books about how terrorist groups operate. This is a book about how terrorist groups conduct intelligence, specifically counter-intelligence designed to protect themselves from the gaze of the government based counter-terrorist agencies. Blake presents us with a varying set of levels of counter-intelligence sophistication that these groups practice as well as the social, geographic and structural elements that affect the success of these practices. He demonstrates that both these tactics and elements are two edged swords; success in one aspect can create a weakness in another. Blake points out that this is good news for counter-terrorist agencies and recommends that they focus on these weaknesses of the terror groups as a means of disrupting their operations.