tommorris

The God Delusion is a popular book, not a scholarly refutation of all arguments for the existence of God.

A good introduction to the basic things which philosophers in the Anglo-American/analytic tradition worry about

how he deals with this is an interesting problem is a model of clarity and philosophical excellence.

Gadamer isn't like that. He sets out to try and answer the question "how do we understand texts?"

Russell's "Why I Am Not A Christian"

Robin Le Podevin's "Arguing for Atheism"

Michael Martin's "Atheism: A Philosophical Justification"

A slightly easier read is Julian Baggini's "Atheism: A Very Short Introduction" which is okay.

I found Onfray's "In Defence of Atheism" a pretty good read - it is polemical, but is well-written.

the much less read compilation "Russell on Religion"

Another good book from an agnostic rather than atheist perspective is Anthony Kenny's "The God of the Philosophers".

Nick Everett's "The Non-Existence Of God"