This book describes the Central Intelligence Agency (CIA), discussing how they gather information, use special equipment, and search for threats to U.S. safety.

This book describes how the Federal Bureau of Investigation (FBI) investigates crimes to find and arrest criminals, terrorists, and spies.

Describes the acivities and duties of the Border Patrol in defending the borders of the United States.

This book describes the U.S. Secret Service, a law enforcement agency that guards U.S. and world leaders and stops crimes involving fake money.