Ghost of a Flea — James Sallis

The mystery of private investigator Lew Griffin is revealed in the conclusion of this critically acclaimed, groundbreaking series.
 
In his old house in uptown New Orleans, Lew Griffin stands alone in a dark room, looking out. Behind him on the bed is a body. Instead of speaking, he reflects on his life -- his failing relationship, his missing son, the fact that he hasn't written in years -- and how the two of them ended up there.
 
In a novel as much about identity as about crime, the answers to Lew's personal mysteries begin to become clear in the series' brilliantly constructed climax.