Among the many excellent books on Yale's history are:
Benson, Richard. A Yale Album: The Third Century. Yale Univeristy Press, 2000.
Kelly, Prooks Mather. Yale: A History. Yale University Press, 1974.
Pierson, George Wilson. Yale: College and University, 1871-1937. 2 vols. Yale University Press, 1955-60.
Scully, Vincent, et al. Yale in New Haven: Architecture and Urbanism. Yale University, 2004.
Yale: Landmarks and Leaders. Yale University, 2006.