The Medford Public Library’s Monday Morning Mysteries book group gathers to discuss “The Sweetness at the Bottom of the Pie” by Alan Bradley. The group usually meets at 10 a.m. on the first Monday of the month through May. Register through the library’s online calendar. Upcoming books on the schedule are “Auntie Poldi and the Sicilian Lions” by Mairo Giordano (January 9, second Monday) and “The Thursday Murder Club” by Richard Osman (February 6).