The History Book Group, co-sponsored by the Medford Public Library and Medford Historical Society & Museum, meets via Zoom to discuss “Valiant Ambition” by Nathaniel Philbrick. The book is an account of the middle years of the American Revolution and the tragic relationship between George Washington and Benedict Arnold. The discussion will be led by Elaine Fossett Rittershaus, a digital literacy coach in the Malden Public Schools. Register through Eventbrite.