I rarely write reviews but I see that there are so few reviews on this book and am motivated to comment.
This book is an introduction to atheism, in general, and there are many other books out there like it, but I found this one to be the best out of the dozen 'introductory' books I've read from the 'atheist shelf.' Kerry Walters writes at a depth that is uncommon to see in a lot of pop atheist books and though I find that refreshing it could turn off the 'light' reader, so be warned. Walters writes succinctly, carefully, with little opinion and more just trying to lay out the facts and many opinions and perspectives. His book is not geared towards atheists either, it is very non-confrontational, so it would even make a good read for someone open-minded, interested in, or new to an atheistic worldview.
A couple examples:
I really enjoyed his explanation of what it is like to be a believer, or theist, and then become an atheist. He explains a couple ways this can happen but his main example was the path that many of us take; feeling like we are bad for doubting, having a lot of cognitive dissonance and not being able to put reality and religion together anymore, and finally that feeling of a weight being lifted when we admit we no longer believe. Especially, that liberated feeling we experience at throwing off religion and god-belief, and how exciting that can be. For me and many others, Walters had a very intimate explanation of that and I identified with it.
Second, he takes two chapters to explain the arguments for atheism and against theism or god-belief. In my opinion these two chapters were the best I've ever read on the topic. He sometimes gives multiple answers for issues with god belief, or attacks against atheism. I believe he gives roughly 5 different answers to the 'fine-tuning' argument theists use. I had never even heard of a couple of his answers to this complex but ignorant argument, and all five could be used separately!
The chapters are all around the same length, making it easy to know how long it will take you to read and allowing you time to walk away. Walters tries to take an objective view, giving the best arguments both sides have, though, being an atheist, he gives the best answers possible and in my opinion makes it perfectly obvious how poor the theistic side of the debate really is. This book touches on the culture and different types of atheism as well, noting that atheism itself is only one answer to one question, and from there, the beliefs and opinions of atheists are as numerous as there are atheists.