Eleanor Marx has disappeared. In this engrossing novel, we follow Sherlock Holmes as he tackles his most difficult case. He must find Karl Marx's favorite daughter and return her to the house of her father. At the behest of Frederick Engels, Holmes undertakes the search for Eleanor that leads him into a world he has never encountered before, the fascinating Bohemian intellectual world of London in 1881. With his trusted friend Dr. Watson in tow, Holmes...