This casebook defines a new field that combines two disciplines, criminal law and intellectual property. The casebook first reviews traditional larceny and civil misappropriation law. Subsequent chapters present various types of conduct (theft, misappropriation, infringement) that target specific kinds of property (trade secrets, copyrights, confidential business information, and personal identifying information). The material focuses on substantive law and policy and provides theoretical rationales for assigning rights in intellectual property; it is thus readily accessible to all students. This flexible casebook can serve in a stand-alone upper-level course or as a supplement in intellectual property or advanced criminal law classes.