Edgar Wallace 
Clue Of The Twisted Candle [PDF ebook] 

Kara hates candles. He also believes that there is a great criminal lost in John Lexman, the detective-story writer involved in a plot more fantastic than any of his own ingenious mysteries. It is no secret that Kara had hoped to marry the beautiful Grace, but she is now Lexman’s wife. But Lexman owes Vassalaro, the Greek moneylender, and Vassalaro has threatened to kill him. A tense and powerful tale that moves dramatically between London and the Balkans.