WhoDunnits is a discussion group devoted to mysteries that follows a yearlong program of books and movies around a single topic. This year we’re taking a look at International Mysteries, both contemporary and historical.  It’s murder worldwide!The first in Donna Leon’s acclaimed series featuring Venice’s Commissario Guido Brunetti. Brunetti must solve the murder of a conductor poisoned during the intermission of La Traviata at Venice’s premier opera house.  Many people wanted him dead, and the Commissario must sort through a variety of suspects. Along with the mystery, readers get a guided tour to La Serenissima, its food and its locations, from a man who knows both intimately.