This book consists of a series of dialogues on the relationship between belief in God and the world of nature. One participant is a Christian who believes one can base belief in God on reason and science, one is a Christian who thinks looking for such a base is unnecessary and even undesirable, and the third is an atheist. As the argument goes back and forth, it touches on such topics as the origin of the universe, various alleged pieces of evidence for design, and the existence of laws of nature. The dialogues do not aim to settle anything but rather to take readers far enough into an issue to understand some of its complexities and, hopefully, to set them thinking.