Why There Is No God
The author summarises my view of this book in the introduction. It makes a good read for those who are new to atheism or those who are curious about the arguments that atheists and the religious put forward in debate.
There is nothing earth-shattering in the content. However it does a good job of covering the key counter-arguments to the usual challenges that most atheists will have encountered before. Each counter is laid out in a a structured approach. They cover topics ranging from "the burden of proof" and "scripture as proof" to "morality" and "the complexity of life".
The thing I enjoyed most about reading "Why There Is No God" is that the author, Armin Navabi, is an ex muslim. Most such books that I have encountered have been written by ex-christians. Navabi bring a lot of Islamic context to the discussion which is refreshing.
Having the book on hand would be a useful source of reference when needed. But, if you are an experienced atheist, don't expect any revelations.