Since 9/11, the needs of intelligence agencies as well as the missions they conduct have increased in number, size, and complexity. As such, government and private security agencies are recruiting staff to analyze the vast amount of data collected in these missions. This textbook offers a way of gaining the analytic skills essential to undertake intelligence work. It acquaints students and analysts with how intelligence fits into the larger research framework. It covers not only the essentials of applied research, but also the function, structure, and operational methods specifically involved in intelligence work. It looks at how analysts work with classified information in a security conscious environment as well as obtain data via covert methods. Students are left with little doubt about what intelligence is and how it is developed using scientific methods of inquiry. This revised edition of the popular text has been expanded and updated significantly.