Excellent collection of critical essays on Theory of Justice by some of the best thinkers of the era. Worth reading even if, or perhaps especially if, you are skeptical of Rawls.
Get the newer edition, though. The binding on the original editions falls apart easily.
A Theory of Justice is the only competitor to the philosophy of language's impact on 20th century philosophy according to John Searle. At its crudest, Rawl's breakthrough thought experiment is to ask what kind of society you wish to be born into without any knowledge of what kind of person you will be, what he refers to as "the veil of ignorance," but with general knowledge of mankind in the abstract. I though it was a straightforward enough idea and in fact brilliant. But these essays made it clear that there's much to consider about his suggestion and it is by no means as coherent a view as might first appear. It would be better to read the book before tackling these essays, but I suppose the various authors give enough of the background to make it readable without have waded through A Theory of Justice's almost 600 pages.