While not a book per say, I do highly recommend the website Biologos which was actually founded by Francis Collins (The leader of the Human Genome Project). There are a wealth of articles from various writers, such as "Genesis and the Flood: The Importance of Genre" & "Why the Church Needs Multiple Theories of Original Sin"
Reading through the articles and picking up some of the books from a few of the more prominent writers (such as N.T Wright) totally changed my view on a lot of things, the bible specially.
It's honestly a wonder how the Watchtower can still fling around its tracts and act like this is the most ground-breaking and satisfying ~spiritual food~ that anyone has to offer, when they never even attempt to challenge themselves and their teachings. Half of what they teach are simple basic teachings, and the other half wind up being just straight up wrong.