(book) "Islam: A Mosaic, Not a Monolith". Washington, DC: Brookings Institution Press, 2003. ISBN 0815732821
(book) "Censorship: Five Hundred Years of Conflict". New York: Oxford University Press, 1984. ISBN 0195035291
(book) "Emergence of Modern Afghanistan: Politics of Reform and Modernization, 1880-1946". Palo Alto, CA: Stanford University Press, 1969. ISBN 0804707065