In general, Shawn didn’t like taking on two cases at once. Not since the time he’d gotten mixed up and had accused a suspect in one case of committing the murder in the second. But this was different. One of these cases, as they said on the movie posters, was personal.

So while Shawn continued to search for Macklin Tanner, he was simultaneously going undercover to spy on Gus. Fortunately his cover was strikingly similar to his own persona-in fact, he was going undercover as himself-so he could move back and forth between his two roles without needing to adjust fake mustaches or even change clothes. But while the outside world might see him as a psychic detective hunting for a missing tech genius, secretly he was engaged in spying on his partner.

Gus hadn’t made it easy on him. There were no surreptitious phone calls, no mysterious meetings, not even any unexpected e-mails in any of Gus’ accounts. If he was hiding something, Gus was playing it cool. Which was, to Shawn, the most suspicious sign yet, since Gus and “cool” were almost never mentioned in the same sentence.

Shawn was beginning to think he might have to consult the army field interrogations manual to find the truth when Gus finally slipped up. They were hanging out at the office when Shawn mentioned he was in the mood for pizza from LaVal’s by the Pier, the one place in town that didn’t deliver. This wasn’t the first time Shawn had mentioned this craving, and usually it led to forty-five minutes of Gus refusing Shawn’s offer to wait at the office if Gus wanted to run down and pick up the pie, and then to the inevitable call to Domino’s. But this time Gus didn’t argue at all. He asked what toppings Shawn wanted.