Mask for a diva

From Goodreads: Stan Kraychik #4 Stan Kraychik, Boston hair-dresser extraordinaire, has been hired as the wig master's assistant for the upcoming season of a local opera company. For the main event, Italian opera diva and aging soprano Marcella Ostinata will perform the lead. As the company heads unsteadily towards opening night, murder threatens the entire festival and Stan finds himself playing a crucial role in a deadly grand opera, performed without music, and with real weapons and killers.