What is the relationship between faith and reason? Find out in PHILOSOPHY OF RELIGION: AN INTRODUCTION. Because it’s written to be easily understood no matter your background, this philosophy of religion textbook introduces you to the debate in a way you can understand. Whether it’s the philosophical proofs for God’s existence or using reason to evaluate faith claims, the major points in the philosophy of religion are all covered in this excellent textbook. And with its built-in study tools, PHILOSOPHY OF RELIGION: AN INTRODUCTION helps out during test time as well.