The Dance of the Seagull
(book #15 of the Inspector Montalbano series)
by Andrea Camillieri. More good stuff from Camillieri. In this book, Inspector Montalbano's right hand man, Fazio, goes missing after trying to help out a friend. In parallel to trying to figure out what has happened to Fazio, Montalbano and his team are confronted with a murder, maritime smuggling ring, and local mafiosi.