Jacques Derrida (1930-2004) was director of studies at the Ecole des hautes etudes en sciences sociales, Paris, and professor of humanities at the University of California, Irvine. He is the author of many books published by the University of Chicago Press. Peggy Kamuf is the Marion Frances Chevalier Professor of French and Comparative Literature at the University of Southern California. She has written, edited, or translated many books, by Derrida and others, and is coeditor of the series of Derrida's seminars at the University of Chicago Press.