Usually, when I read a book, I end up reading several books together. Maybe I have trouble finishing what I start when it comes to books; maybe the book starts out boring and I don't want to have to endure it if I don't have to. Somehow, though, I still read a good deal, even after graduating from seminary, when many people would like to take a few years off from reading.
One book I'm reading is The Christian Atheist by Craig Groeschel. The subtitle reveals the gist of the book: Believing in God but Living as if He Doesn't Exist. It's not deep, but it hits right where many (most?) Christians are at.
One book I've barely started but am interested in digging through is the Calvinist classic The Reformed Doctrine of Predestination by Lorraine Boettner. This work is a classic presentation of Reformed theology (5-point Calvinism). Why am I, a non-Calvinist, reading it? A quote I heard long ago comes to mind: before you can say, "I disagree," you need to say, "I understand." There are some things about Reformed theology I don't understand.
I have recently read Glenn Sunshine's Why You Think the Way You Do: the Story of Western Worldviews from Rome to Home. I reviewed this book for the Stone-Campbell Journal, which will come out in the spring. Sunshine traces major ideas from the Roman Empire through modern times and how those ideas affect our ethics, actions, priorities, etc. In short I thought it was too big of a task for a popular-level book of less than 250 pages, and I would refer the reader to the works of Rodney Stark for better stuff in this area.
Then there are many books to which I turn when preparing for lessons, sermons, and answering general inquiries. These books are read a chapter here, a chapter there. Recent shelf pulls include The Kingdom of the Cults, The Quran, The Book of Mormon, The Faith Once for All, Heaven, What the Bible Teaches About Spiritual Warfare, Pagan Christianity?, The Apostolic Fathers, BAGD, NIDNTT, TDNT, NIDOTTE, A Reader's Greek New Testament.
Oh yeah, and The Bible. :)