A solid contribution from Paul Tillich. This is by no means his definitive work (see Systematic Theology for that). This is a far easier alternative to Systematic Theology, written more for the layman. It is really a curiosity piece for people who are passionate about Tillich, but not the type of book you can base your dissertation on, because it is a bit sparse. Also recommended: The Shaking of the Foundations, The Eternal Now, and The New Being, all by Paul Tillich.