The Consciousness Puzzle by Kevin Riley

With his brother missing and his house ransacked, soon-to-be divorced Mike Locke finds himself running from anonymous henchmen and towards even more danger. But thanks to a little help from unlikely sources, Mike decides to stop running and to start fighting back. As he digs deeper to discover the truth behind his brother’s disappearance, Mike is pulled into a world of artificial intelligence and human experimentation that makes him realizes it was a bad time to give up alcohol and cigarettes.