In modern-day Ukraine, east of the Carpathian Mountains, there is an invisible city. Known as Czernowitz, the "Vienna of the East" under the Habsburg empire, this vibrant Jewish-German Eastern European culture vanished after World War II--yet an idealized version lives on, suspended in the memories of its dispersed people and passed down to their children like a precious and haunted heirloom. In this original blend of history and communal memoir,...