To survive terrorist organizations have to make new members. If the recruitment process is interrupt and stopped sooner or later the terrorist organization will die. Understanding why an individual breaks his or her bonds with society and joins a terrorist organization is a very complicated issue.One of the difficulties is lack of data and field studies. It is almost impossible for researchers to do field studies on terrorist organizations. This book however is a very significant study because of the author s 13 years of field experience and the unique data presented in it.This data was written inside terrorist cells by members of those terrorist organizations and then obtained by the Police from those cells.The author s extensive field experience and this data give readers a deep understanding of the recruitment process of terrorist organizations.Even though the data are gathered from different terrorist organizations both Marxist-Leninist revolutionary and religiously motivated terrorist organizations there are many similarities in the backgrounds of members.Therefore this book sheds light on the terrorist recruitment process and for future studies.