By Smith, T'ai McKenzie Wark. Gamer Theory. Cambridge, MA: Harvard University Press, 2007. 240 pp., 8 b/w ills. S 19.95 Alexander R. Galloway and Eugene Thacker. The Exploit: A Theory of Networks. Minneapolis: University of Minnesota Press, 2007. 256 pp., no ills.

By Schaffer, Daniel; Masood, Ehsan; Ndege, Yvonne; Bagla, Pallava; Mantell, Katie Up to a billion people live in the drylands of the developing world. They are invariably among the world's poorest, and many belong to some of the world's oldest cultures, struggling to come to terms with modernity.

By Kane, Sylvia REACHING HIGHER: The Power of Expectations in Schooling. Rhona S. Weinstein. Cambridge, MA: Harvard University Press, 2002. 345 pp. Hardback. $45.00.

Historical Biogeography: An Introduction.-J. V. Crisci, L. Katinas, and P. Posadas. 2003. Harvard University Press, Cambridge, MA. 264 pp. ISBN 0-674-01059-0. $45.00 (hardcover).