Hadley Arkes argues that it is necessary to move "beyond the Constitution," to the principles that stood antecedent to the text, if we are to understand the text and apply the Constitution to the cases that arise every day in our law.
This book is amazing. If you ever wanted to delve beyond the constitution this is for you. Although it might be slightly conservative, this man makes up for his ideological bias through his sheer tour de force of knowledge along with his friendship with Clarence Thomas and Antonin Scalia.