This wasn't one of Green's best. The story was good, but she drew the story out far too long. Also, unlike most of her books, there seemed to be a serious editing problem toward the end. She did the usual maddeningly slow reveal of how the killer managed to kill without leaving a trace then she went

A woman has died in plain view on the Mezzanine floor of an upscale hotel. She has been stabbed apparently and, although there is no weapon nearby, the coroner determines it to have been suicide. Sergeant Sweetwater is not convinced, especially when he recalls an unsolved murder over in Brooklyn.

So

The story involves the murder of a young woman in a very public location. The physical method employed is a major part of the mystery as no one was close enough to inflict the fatal wound. There was no exit wound, no bullet and no arrow found.

The first half of the story takes place in New York city

Let me start this off with saying, You Will Not Guess How the Crime is Committed. You Just Won't. Unless you have a magnificent imagination like the author evidently did.

It's almost got a science fiction feel to it.

Inventor.

Miss Edith Challonder is a young and well known society woman with a repu

Millionairess Miss Edith Challoner is killed while staying at the Clermont Hotel, while sitting in plain sight and no-one near her. How and why. Detectives Gryce and Sweetwater investigate.
Interesting mystery but I knew straightaway how it was done.

A woman is murdered in full view of witnesses. She is seemingly stabbed to death, yet no one was seen near her. How then was she killed? Green always has an interesting way of narrating her books. The narration is begun by a woman who at the periphery of the crime then she bows out of the story and