Religion and the American Constitutional Experiment.
Oxford University Press, 2016. 424p. Paperback. This book by John Witte and Joel Nichols is probably the best combination that exists of historical background, theoretical understanding, and legal doctrines of the religion clauses. It allows scholars, students, and other citizens to grasp the history behind the clauses without undertaking full-scale research on their own. The book is also a superb source to understand modern controversies and how courts are dealing with them. Kent Greenawalt, University Professor, Columbia Law School (Publisher's information).