Terrorism is not a new phenomenon, but almost all communities, regardless of ethnicity, religion, social status or location, are now increasingly facing the challenge of terrorist threat. What makes a terrorist organization attractive to some citizens? A better understanding of the reasons why individuals choose to join terror groups may well enhance efforts to disrupt the recruitment process of terrorist organizations and thereby support current and future counter-terrorism initiatives. This book presents the proceedings of the NATO Advanced Research Workshop, ′Countering Terrorist Recruitment in the Context of Armed Counter-Terrorism Operations′, held in Antalya, Turkey, in May 2015. The goal of the workshop was to share existing ideas and develop new ones to tackle terrorist recruitment. The book contains 18 articles covering topics which include: the role of NATO and other international entities in counter-terrorism; understanding recruitment methods and socialization techniques of terror networks by comparing them to gangs; social media in terrorist recruitment; drug money links with terrorist financing; and counter-terrorism and human rights. The book will be of interest to all those involved in developing, planning and executing prevention programs and policies in relation to both armed and non-armed counter-terrorism operations.