"The Empty Mirror," by J. Sydney Jones, is set in Vienna in the summer of 1898. Lawyer Karl Werthen has been bored since he abandoned criminal law six years earlier to specialize in estates and trusts. His life is about to take an unexpected turn as a result of a series of tragic events. An apparent madman has killed five people, both male and female, in the past two months. He mutilated his victims and dumped their bodies in Vienna's Prater amusement park. The police suspect the painter Gustav Klimt of the crimes, since the fifth victim was one of his young and beautiful models. Werner agrees to represent the painter, and in addition, he asks his friend, Hanns Gross, a renowned criminologist, to help investigate the crimes. Unsurprisingly, the two men decide to play sleuth, tracking down leads, interviewing witnesses, and placing themselves in grave danger as they edge ever closer to the truth.
Jones knows Vienna intimately, and he provides colorful details about the culture, architecture, cuisine, and history of this fascinating world capital at the turn of the century. He enjoys name-dropping, inserting such luminaries as Theodor Herzel, Mark Twain, and psychiatrist Krafft-Ebing into the narrative. Unfortunately, the dense plot becomes ever more turgid as the novel progresses, and the aforementioned luminaries are shoe-horned into the story rather than inserted seamlessly. Red herrings abound, leading us to believe that the killings could be the work of an anti-Semite, an anarchist, or someone else with a hidden agenda. By the time the red herrings are disposed of and the puzzle solved, most readers will have lost interest.
Werthen and Gross are an odd couple. The former is a man of means who has been trained by his parents to hide his Jewish roots and behave like an Austrian gentleman. Gross is a Catholic, an intellectual, an author, and a professor, whose eccentricities Karl finds alternately endearing and irritating. The hyperkinetic Gross drags Karl along on an adventure that will lead them to a deadly confrontation with a cunning and ruthless adversary. "The Empty Mirror" has stilted dialogue, minimal suspense, a tepid romance (Werthen meets a young woman with whom he immediately falls in love), and too much background information about the power struggles within the Austrian Empire. For a more intriguing and better-constructed mystery, try "Vienna Blood" by Frank Tallis.