This casebook is designed for a class on legislation, statutory interpretation, and regulation. It uses a combination of highly edited cases and problems to help students explore the practice of these three areas of law, with a strong emphasis on statutory interpretation. The book begins by introducing the legislative process, moves to explore in detail statutory interpretation, and ends with an introduction to the administrative state. After reading this text, students should understand how statutes are enacted and interpreted, the role that agencies play both in regulating and in interpreting statutes, and the breadth of arguments that are available to lawyers that master this topic.