Pietr the Latvian

What he sought, what he waited and watched out for was the crack in the wall. In other words, the instant when the human being comes out from behind the opponent . . .' Who is Pietr the Latvian? Is he a gentleman thief? A Russian drinking absinthe in a grimy bar? A married Norwegian sea captain? A twisted corpse in a train toilet? Or is he all of these men? In Simenon's first novel featuring Maigret, the laconic detective is taken from grimy dive bars to luxury hotels as he solves this strange enigma.