" I should like one day, as some anonymous pedestrian revisiting the scenes of these memories, to follow on the heels of an attentive reader - here are some - and to relish his delight when, with this book in his pocket, he finds himself in the presence of one of the characters described, mentioned or referred to earlier on, who do exist, large as life, and wittingly or not perpetuate their legend. I’d like people to investigate, to verify. You need to be an extremely well-informed reader to identify all the ‘keys’ scattered throughout these pages. Many readers may find among them the key to their own front door.

In any case, what you need to know is this: in certain areas of Paris, the supernatural is part of everyday life. Local people accept this and have some involvement with it. "

― Jacques Yonnet , Paris Noir: The Secret History of a City