Here is an excellent primer of Christian theology for the neophyte or the long-time believer. Whoever thinks that theology is dull and stodgy needs to read this work to see that studying the doctrines of God is rich, encouraging, and beautiful.
Read this sometime soon, either alone or with a study group. You will be glad that you did.
I included this book as one of my top ten suggestions to building a Christian library. See the list here.