This is an old 1936 detective novel featuring the character Dr. Fell. Not sure of the connection to the Nights in particular but it's got a nice looking cover. I haven't read it but here's the plot summary from wikipedia:
"When Scotland Yard detective John Carruthers attends the Wade Museum of Oriental Art, and begins to investigate the interior of one of a series of carriages on exhibit, he is sarcastically told by the night watchman "Watch out when you touch it! There's a dead man inside!" Of course, a dead man tumbles out. The corpse has been stabbed with an elaborate Persian dagger, is wearing an obvious set of false whiskers, and is clutching a cookbook. Gideon Fell must investigate the death and explain all the bizarre circumstances of what was a very busy night at the museum."
And more about the author: http://en.wikipedia.org/wiki/John_Dickson_Carr
And some other covers of the same book: