The Legal Theory Bookworm recommends Justice and the Social Contract: Essays on Rawlsian Political Philosophy by Samuel Freeman. Here is a blurb:
John Rawls (1921-2002) was one of the 20th century's most important philosophers and continues to be among the most widely discussed of contemporary thinkers. His work, particularly A Theory of Justice, is integral to discussions of social and international justice, democracy, liberalism, welfare economics, and constitutional law, in departments of philosophy, politics, economics, law, public policy, and others. Samuel Freeman is one of Rawls's foremost interpreters. This volume contains nine of his essays on Rawls and Rawlsian justice, two of which are previously unpublished. Freeman places Rawls within historical context in the social contract tradition, addresses criticisms of his positions, and discusses the implications of his views on issues of distributive justice, liberalism and democracy, international justice, and other subjects. This collection will be useful to the wide range of scholars interested in Rawls and theories of justice.
And two short review blurbs:
"Freeman is the leading authority on the thought and writing of John Rawls, and Rawls was the leading political and social philosopher of the twentieth century. Freeman's clear, careful, and deeply informed studies in these essays offer important insight about basic questions of interpretation and justification--about Rawls's contractualism, about his relation to utilitarianism, about the idea of public reason, and about his reasons for limiting his principles of distributive justice to the self-contained nation-state."--Thomas Nagel, New York University
"Freeman is one of the leading political philosophers of his generation. His influential papers include some of the most sophisticated and illuminating discussions of themes from Rawls's earlier and later work. This important collection will be essential reading for anyone with a serious interest in political philosophy." --R. Jay Wallace, University of California at Berkeley
If you are interested in Rawls, this book belongs on your shelf! Highly recommended!
