The Medford Public Library’s Monday Morning Mysteries book group gathers to discuss “Auntie Poldi and the Sicilian Lions” by Mario Giordano. The group normally meets on the first Monday of the month; this month’s session is on the second Monday due to the holidays. Register through the library’s online calendar. Upcoming books on the schedule are “The Thursday Murder Club” by Richard Osman (February 6) and “The Magpie Murders” by Anthony Horowitz (March 6).