The Clue of the Twisted Candle by Edgar Wallace.

The Clue of the Twisted Candle by Edgar Wallace.  The Clue of the Twisted Candle is a 1918 detective novel by Edgar Wallace, featuring a locked-room mystery, a framed mystery writer (John Lexman), and a Scotland Yard investigator (T.X. Meredith) trying to clear his friend's name. The plot involves a wealthy, villainous figure, Remington Kara, who frames Lexman for murder, leading to a prison break and a later, even more baffling locked-room murder of Kara himself, with two twisted candles as the key clue. It's known for its fast pace, intricate plot, and classic Wallace elements like deception and suspense.