A space shuttle descends from the sky and lands in a crowded courtyard in front of the Royal Ontario Museum in Toronto. Out steps a six-legged alien who calmly walks inside and asks to be taken to a paleontologist. The alien wants to compare notes on paleontological history, and he is stunned to discover that many of Earth's leading scientists don't believe in the existence of God. He has proof that God exists.

I mostly like this book because it is full of interesting ideas. If God exists, why do we suffer? Why did God create such a thing as cancer? Mr. Sawyer proposed possible answers to these questions as well as others. Although classified as hard sci-fi, the science provided in the story was not too complex, and anything that might've been complex came with explanations. The writing was mostly fairly simple and this was a very quick, although enjoyable, read for me. The author was careful to make a distinction between the existence of God and the validity or religion. For example, proof that God exists is not proof that there is a Heaven, that we have souls, or that the events depicted in the Bible actually happened.

The main thing I didn't like about this book was the fact that although the author provided a lot of scientific detail, there were several facts he presented that I know to be untrue. This, of course, made me question the accuracy of the other details he provided. I also didn't enjoy the ending of this book. I thought it was just too much. The author attempted to answer some questions which I think would've been better left unanswered. I think this book would've been better if it had ended twenty pages sooner. But over all this was an amusing story with thought-provoking ideas and I enjoyed it very much.