Extreme Prey by John Sandford

An extraordinary Lucas Davenport thriller from #1 New York Times -bestselling author and Pulitzer Prize winner John Sandford. After the events in Gathering Prey , Lucas Davenport finds himself in a very unusual situation--no longer employed by the Minnesota BCA. His friend the governor is just cranking up a presidential campaign, though, and he invites Lucas to come along as part of his campaign staff. "Should be fun " he says, and it kind of is--until they find they have a shadow: an armed man intent on killing the governor...and anyone who gets in the way.