Maigret's Dead Man

After receiving a series of mysterious calls from a man who later turns up dead, Maigret must plunge into the murky Parisian underworld to solve the case. The twenty-ninth book in the new Penguin Maigret series.
 
A man calls Maigret from a cafe and asks for police protection, saying he’s being followed by men trying to kill him. The next day, the man’s body is identified in the street. To catch the killer, Maigret must piece together the details of his dead man’s life, leading police into the crowded, fetid underground world of the Paris slums in the process.

This novel was published by Penguin in a previous translation as Maigret’s Special Murder.