Cairney P (2012) Understanding Public Policy: Theories and Issues. Basingstoke: Palgrave. http://www.palgrave.com/products/title.aspx?pid=360100
A major new introduction to theories of public policy. The author provides an accessible assessment of a wide range of theories and models from policy cycles, policy transfer, rational choice and socio-economic explanations to multi-level governance, advocacy coalitions and punctuated equilibrium and of their value to policy analysis.
Sample chapter, 'Punctuated Equilibrium', available in STORRE: http://hdl.handle.net/1893/16029