Constitutional Law refers to the field of study and practice focused on the interpretation and application of a country's constitution, including its principles and procedures. This category encompasses political science books that delve into the analysis of governmental systems, political activities, and political behavior. It also includes books about politics, specifically those addressing the theory and practice of politics, policies, and political systems. Broadly, it spans all books that analyze, interpret, or explain the legal aspects of a constitution, political science, and politics.