Another great Canadian writer. He received an Honourary PhD at my daughter's graduation, was a pleasure to listen to. For my American friends, the title is "Someone Knows my Name" as the title was offensive in the US.
One of the most depressing books I've ever read, but I couldn't stop reading it. The world is destroyed by unnamed means and everything is dying. A man and his son follow back roads to the west coast, hopeful they'll find some sort of civilization.