This is the first book in a line of books of this kind. I have read one other book by Unger, his Bible Handbook, which was highly comprehensive of the OT and NT in survey form. This book is much more personal and spiritual. Unger describes how Christians can and have become possessed, controlled, influenced, and targeted by demons. He also builds a very strong case to support each of these thoughts and actions. Much of this book has been written from his own first-hand accounts and also much of it supported directly by Scripture. I can see his case and this book causes me to desire to more fully expand upon this topic by taking in other views, which I hope to be able to do in the near future. In the meantime, I do feel edified and blessed to have read these contents and will share these thoughts with others throughout my Kingdom work.