Book excerpt: Homeland Security Intelligence is the first single-authored, comprehensive treatment of intelligence. It is geared toward the full range of homeland security practitioners, which includes hundreds of thousands of state and local government and private sector practitioners who are still exploring how intelligence can act as a force multiplier in helping them achieve their goals. With a focus on counterterrorism and cyber-security, author James E. Steiner provides a thorough and in-depth picture of why intelligence is so crucial to homeland security missions, who provides intelligence support to which homeland security customer, and how intelligence products differ depending on the customer’s specific needs and duties.