At the Gate of Christendom: Jews, Muslims and “Pagans” in Medieval Hungary, c. 1000–c. 1300. By Nora Berend (New York, Cambridge University Press, 2001) 340 pp. $45.00 Shylock's Children: Economics and Jewish Identity in Modern Europe. By Derek J. Penslar (Berkeley, University of California Press, 2001) 374 pp. $45.00