(en) Labour and Poverty in Rural Tanzania: Ujamaa and Rural Development in the United Republic of Tanzania, Oxford University Press, New York, 1991 (ISBN978-0198283157).
(en) The Bottom Billion: Why the Poorest Countries are Failing and What Can Be Done About It, Oxford University Press, 2007 (ISBN9780195311457) [1].
(en) Wars, Guns and Votes: Democracy in Dangerous Places, Harper, March 2009 (ISBN978-0061479649)