Beegel, Susan F. Introduction. Cup of Gold: A Life of Sir Henry Morgan, Buccaneer, with Occasional Reference to History. By John Steinbeck. New York: Penguin, 2008.

McElrath, Joseph R., Jesse S. Crisler and Susan Shillinglaw, eds.  John Steinbeck: The Contemporary Reviews. Cambridge: Cambridge UP, 1996.

Steinbeck, John. Cup of Gold: A Life of Sir Henry Morgan, Buccaneer, with Occasional Reference to History. New York: Penguin, 2008.