Ambiguity and Choice in Public Policy: Political Decision Making in Modern Democracies. By Nikolaos Zahariadis. Washington, DC: Georgetown University Press, 2003. 208p. $26.95.

Nikolaos Zahariadis has written an interesting and ambitious book that extends to other countries and later stages of the policy process John Kingdon's classic insight into agenda setting—that policies are the result of streams of problems, solutions, and politics, coupled by policy entrepreneurs when windows of opportunity open.