This is not an easy book. Listening to the audio version of it impels me to buy the hardcopy. Reason being, I have to look up the scripture references he refers to. Pray for discernment as you go thru this book. I have about two hours left in the audio version and i try to think of it as how a creationist will see scripture. This subject of the unseen realm does not change my thinking about God and sin and the gospel, it helps me understand things which are often overlooked. I gave it three stars because I am not sure yet wether this is knowledge for knowledge sake or it is knowledge to help me understand more of scripture. It definitely tackles some very thought provoking subjects.