A History of God, the 4000 year quest of Judaism, Christianity and Islam by Karen Armstrong is exactly as the title states. It is the book to read if you want to become familiar with the views of the three monotheistic religions. She talks about God from different perspectives. The God of the philosophers, of the mystics, for the Reformers and then asks as so many have since the horror of the 20th century, is God dead?

This is not an easy reading book. To get the most out of it you need to read it slowly. Pay attention. She will reward you for your time.