Single White Male by Julian M. Miles

Fear the Tide. It washes everything away, or it brings lost things back: secrets, crimes, lies. Brannon's memory is like the tide; he can't control it, and he can't hold on to it. Detective Higgin has a problem that is turning into a nightmare, and Brannon is a part of it - or the cause. Under the waxing moon, something new is hunting. Out by the Tide Mills, something old has surfaced. Before the moon wanes, there will be madness, bloodshed, and revelations.