The Medford Public Library’s Monday Morning Mysteries group meets to discuss “Down the River Unto the Sea” by Walter Mosley. Books will be available approximately four weeks in advance. Call the library at 781-395-7950 to have a copy put on hold for you. RSVP for today’s meeting through the library’s online calendar. The title for next month’s meeting, on June 2, will be “The Mystery Guest” by Nita Prose.