Theology and books

I am currently reading Peter Enns' book Curveball: When Your Faith Takes Turns You Never Saw Coming. I am only 1/3 of the way through it, but I am thoroughly enjoying it -- so much so that I was thinking that this is a book worthy of a book club selection and discussion. I kind of wish I had someone to discuss it with as I am reading it.

Having said that, I really don't think I'm much of a book club kind of person. While I do read books of many different kinds, I generally read what I want and at my own speed. I am currently reading through a fiction series of a badass black ops team by Scott Conrad. I often have two books going at the same time -- one fiction and one nonfiction.

Back to Curveball;
I'll get around to writing a review for it when I finish reading it, but I'm wondering if there are theological books that others have read or would like to read that seem to call for discussion as you read through them. I don't know what an online as-you-read book club might look like, or if there are other people in my local area that would be up for an occasional group read of such books, but I'd be interested to try something out.
I'm thinking -- it doesn't even have to be a book centered on theology. They could be books on behavior or how we think or philosophy. I suppose they could be fiction or nonfiction, although I think the genre would typically be mostly nonfiction.

Whether or not such groups exist, I am interested in books of theology or philosophy that you have read and would recommend. I should include books of other religions or belief systems that might not really fall under theology, but address the spiritual lives of its followers. I am particularly interested in progressive Christian authors that have managed to evolve or deconstruct (or whatever they want to call it) in their following of God.

What are you reading?

John