In 1902 Vienna, an inspector for the Security Services teams up with a Jewish psychiatrist to investigate serial murder. Both are musicians, and each is deeply embedded in the urban life of a fascinating city. A visit to Bergstrasse 19 is handled especially well. The setting poses a fascinating formal challenge to Tallis: since the reader knows Vienna stands on the brink of disaster, the mystery’s anticipate restoration of order cannot be entirely succeed; Tallis in this way is an interesting contrast to the early Le Carré. I grabbed this after reading an enthusiastic TLS review of a more recent entry in the series, and was not sorry.