This casebook aspires to help students understand and think systematically about the techniques of statutory interpretation. It blends exposition with illustrative judicial opinions, and it features extensive notes that encourage thoughtful analysis of difficult concepts. Topics include the relationship between text and purpose, canons of construction, the use of legislative history, statutory stare decisis, the interaction between statutes and other sources of law (including the Constitution, other statutes, and the common law), federal preemption of state law, Chevron and Auer deference, and how the interpretation or application of a statute might change as the statute ages. The book is suitable for a full-length, stand-alone course on statutory interpretation.