“The Heron” is the nickname a big-city accountant has attached to himself in his new home near San Diego, where he’s using the alias to avoid a hit man who may be after him. It seems a former client believes that The Heron has skipped town with several million dollars not his own. Don Winslow’s ensuing, entertaining yarn is by turns twisty, dark, and comical as we observe the delicate dance between the pursuer and the pursued.