For Christian Thought, our main textbook is Created for Community by Stanley Grenz. For a basic introduction to the course I use Who Needs Theology? by Stanley Grenz and Roger Olson (I see it listed by just Grenz as well as Grenz and Olson - same book). I also have my students do a "Life Response Project" out of The Life You've Always Wanted by John Ortberg, because theology is not just about correct thinking, but much more importantly about living correctly as a member of God's kingdom. This assignment/book results in something very unusual every semester: thank you notes from students for the work I've assigned! If you decide you want to go much deeper after you've finished these, I heartily recommend Christian Theology: An Introduction by Alistair McGrath. It's available in a number of editions, and any of them from the third edition on are worth getting (just in case you find a big difference in price between 3rd, 4th, and 5th editions).
We actually started our discussion on books with the topic of church history. An excellent and non-boring look at history with an eye to theology is The Story of Christian Theology (also listed as The Story of Christian Theology: Twenty Centuries of Tradition & Reform - get whichever is cheaper) by Roger Olson. I also like the two-volume set The Story of Christianity by Justo Gonzalez.
Have fun meeting some of my friends!