A New York Times-bestselling series: A murder mystery set on Italy's secretive island of Murano, renowned for its world-famous glass. On a luminous spring day in Venice, Commissario Brunetti and his assistant play hooky from work to help a friend, Marco Ribetti, arrested during an environmental protest. They secure his release, only to be faced by the fury of the man's father-in-law, Giovanni De Cal, a cantankerous glass factory owner who has been heard in the bars of Murano making violent threats about Ribetti. Brunetti's curiosity is piqued, and he finds himself drawn to Murano to investigate. Is De Cal the type of man to carry out his threats? Then one morning the body of De Cal's night watchman is found. Over long lunches, on secret boat rides, in quiet bars, and down narrow streets, Brunetti searches for the killer.