Edgar Wallace 
Secret House [EPUB ebook] 

Inspector T.B. Smith of Scotland Yard has got a lot on his plate. Two men are found shot to death outside the door of a millionaire, who happens to live just a few doors down from Smith himself. And a terrifying blackmailer, who runs a crude gossip rag, continues to elude the police. Inspector Smith is on the case, which eventually leads him to a secret, strange house, that sems to have a life of its own… "The Secret House" is a complex and exciting mystery from the "King of Thrillers" Edgar Wallace.-