I found this book to be fairly unhelpful (which is sad because I really enjoyed Walvoord's book on the Holy Spirit). Throughout the book, he assumes more than he argues;this is a big problem if you don't buy his assumptions. Overall, his lack of argument for his assumptions undermines the entire book. If you are a dispensational premillenialist, you will probably love the book, but if you do not agree with the assumptions of that system, you will probably end up being more frustrated by the lack of argumentation than anything else.