Louis Tracy 
A Mysterious Disappearance [EPUB ebook] 

Fun book to read, with lots of unexpected twists and turns. Wealthy, titled, and popular, a London society woman vanishes without a trace, and all trails lead back to a mystery man and a beautiful woman. Family friend Claude Bruce, the last to see her, is haunted by her disappearance, and can’t let it go.
Bruce investigates the mystery in cooperation with (and sometimes at odds with) Inspector White of Scotland Yard—often the butt of comic relief.