Mary Roberts Rinehart 
The Window At The White Cat [EPUB ebook] 

The book starts with Margery Fleming who forces Knox to take the role of detective. First, she sets out to find her father Allan Fleming when she discovers that he has died apparently by suicide. But there is no weapon. Knox continues his search to determine who is responsible for his death. As Knox investigates the crime, he discovers an increasing number of mysterious events, including missing money stolen from a travel bag and lost pearls. Mary Roberts Rinehart has interestingly cooked up the plot by leaving few clues about the mysterious happenings. It is a short story full of action and melodrama. Mary Roberts Rinehart has chosen the characters wisely which makes The Window At The White Cat an interesting read.