Gaithersburg Book Festival (Gaithersburg, MD) Saturday, May 18, 2019 10:00 AM 6:00 PM 10:00 18:00 Gaithersburg Book Festival 31 South Summit Avenue Gaithersburg, MD, 20877 United States (map) Google Calendar ICS Featured author at the Gaithersburg Book Festival — all day Saturday, May 18, at the Gaithersburg City Hall Grounds!