As happens often with Leon's later books, the mystery is slow to kick in. But it is such a joy to spend time with Guido Brunetti that it doesn't matter.

It's summer in Venice, hot and sweaty, and Guido and his Neapolitan counterpart Claudia Griffoni are summoned to the bedside of a dying woman, whose few incoherent comments send them on a quest that eventually involves pollution-- a repeating theme in Leon's books.

Signorina Elletra Zorzi plays a big role here, and it's always wonderful to see her in action. The other main characters play very supporting roles, with little from Paola or Vitello, but it doesn't matter. Guido is the guy we read for.