The Lure, Stillwater Runs Deep Series, Book Two:

The Lure
Vancouver’s mayor is found brutally slain in Stanley Park by Pauline Johnson's monument. His family is missing.

After a night of drunkenness a reporter wakes up in a part of town he’s never visited and begins investigating why he's having strange nightmares of a life not his.
Which begs him to question the validity of the urban myth, when you get drunk enough you don't remember anything you did? Could it be possible there's a place where spirits might take over to have a little fun on...