This is a scholarly work that is very in depth and thought provoking. Each chapter could be (and probably is somewhere) a book on its own. It is well written and will provide ideas for discussion and debate.
If you would like to know more about theology, this is your book. It is both accessible and smart and surprisingly comprehensive for its size. What's different about it is that the author Markham takes a position. Most textbooks attempt to present all arguments as neutral and equally viable, but Markham lays his cards on the table.