It is a luminous spring day in Venice, as Commissario Brunetti and Inspettore Vianello come to the rescue of Vianello's friend Marco Ribetti, who has been arrested while protesting against chemical pollution of the Venetian lagoon, only to be faced by the fury of Marco's father-in-law, owner of a glass factory on the island of Murano. But clearly there is another victim who has uncovered the guilty secret of the polluting glass foundries of the island of Murano, and whose body is found dead in front of the furnaces which burn at 1400 degrees, night and day. The victim has left clues in Through a Glass Darkly - Donna Leon od authora Donna Leon a nakladatelství za skvělé ceny na e-shopu Martinus. cz.