The book starts out like the setup for some punny science fiction joke: An alien walks into a museum and asks if he can see a paleontologist. But the arachnid ET hasn't come aboard a rowboat with the Pope and Stephen Hawking (although His Holiness does request an audience later). Landing at the Royal Ontario Museum in Toronto, the spacefarer (named Hollus) asks to compare notes on mass extinctions with resident dino-scientist Thomas Jericho. A shocked Jericho finds that not only does life exist on other planets, but that every civilization in the galaxy has experienced extinction events at precisely the same time. Armed with that disconcerting information (and a little help from a grand unifying theory), the alien informs Jericho, almost dismissively, that "the primary goal of modern science is to discover why God has behaved as he has and to determine his methods."

Robert James Sawyer (born April 29, 1960) is a Canadian science fiction writer. He has had 19 novels published, and his short fiction has appeared in Analog Science Fiction and Fact, Amazing Stories, On Spec, Nature, and many anthologies. Sawyer has won over forty awards for his fiction, including the Nebula Award (1995), the Hugo Award (2003), and the John W. Campbell Memorial Award (2006).

Sawyer was born in Ottawa and is now a resident of Mississauga.