The Medford Public Library’s Monday Morning Mysteries group meets to discuss “The Mystery Guest” by Nita Prose. 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 July 7, will be “A Beautiful Mystery” by Louise Penny.