Roosevelt and the Isolationists by the historian for America First, Wayne Cole. FDR Goes to War, Burton W. Folsom, Jr., and Anita Folsom December 1941 by Craig Shirley December 1941: Twelve Days That Began A World War, by Evan Mawdsley 1941: Fighting the Shadow War by Marc Wortman 1941 by William K. Klingaman. There's also an excellent analysis of British-Japanese relations before Pearl Harbor, but bugger me if I can remember the author's name. (Trolling)