J.L. Schellenberg is arguably one of the leading philosophers of religion in the world and, among other things, the philosopher who formulated the argument from divine hiddenness for atheism. Schellenberg reviewed The Cambridge Companion to Atheism (ed. Michael Martin) in the Notre Dame Philosophical Reviews.
I myself think that a good case for atheism (understood as disbelief of traditional theism) can be developed, but the arguments in this book leave one with the impression that the case is weaker than it is, and it must be said that the available arguments for theism are stronger than they are here suggested to be. Still, the student or nonspecialist will be able to take away from both the philosophical and the nonphilosophical discussions that this work contains a pretty good idea of which issues are important to the understanding and assessment of atheism, and should be stimulated — if only through disagreement — to think more carefully about those issues for herself.