Lawrence DiCara, former Boston City Council president and Marion summer resident, will hold a book reading and discussion Nov. 19 at 6:30p.m. at the Mattapoisett Free Public Library, on Barstow Street. DiCara’s new book, “Turmoil and Transition in Boston,” deals with his becoming the youngest person ever elected to the Boston City Council (at age 22), the times surrounding the busing crisis in the city, and the strain of running for public office. In 1983, DiCara ran for mayor of Boston, finishing fourth in a preliminary election that eventually led to the election of Ray Flynn. DiCara is a lawyer and partner at Nixon Peabody.