This book provides an accessible introduction to the emerging field of behavioral public choice economics and the law. This field studies how public officials, lawmakers, and judges fall prey to their own biases and heuristics, and how constitutions and judicial doctrines can be structured to mitigate these cognitive shortcomings. Written lucidly in plain language, this book is invaluable to all students, scholars, and general readers interested in behavioral economics, law and economics, and political economy.