Our Proprietors Reserve Sale is on now through Saturday, February 28. Urban Center Books is the bookstore of the Municipal Art Society and is located at 457 Madison Avenue, at E. 51st St. Opening hours are: Monday, Tuesday, Wednesday, Thursday, Friday: 10:00 a.m. – 6:30 p.m.; and Saturday: 12:00 – 5:30 p.m. Visit www.urbancenterbooks.org for more information.