Most of Edgar Rice Burrough's books are in the free domain. I'm a big fan of the Tarzan series of 24 novels.
I read them all when I was junior high age, they are very dated but I really liked them, the first one was written in 1912, The movies have never really followed them.
He also wrote the John Carter novel series, what the current movie is based on.
"Free From The JOB Reign Of Error"
Reading the Foundation Trilogy, by Isaac Asimov, some 36 years after I first read it. I guess it's not a trilogy anymore since are 7 volumes now, as Mr. Asimov wrote some more after I read it the first time.
The Nature of Nature: Examining the Role of Naturalism in Science
I actually won this book in an online contest. Thus far, it's lived up to my expectations, if not exceeded them.
For the record: I consider atheism to be irrational, and, from my experiences, is typically based on emotions and logical fallacies. On the ladder of reason, I consider it several rungs beneath magic.
I'd love to elaborate, but this discussion is (I think) against the rules. Plus, my views tend to get certain people (neck-beards and mouth-breathers) extremely butthurt, and I'd rather stay friendly with everyone here.