I will add more and modify this list so please stop back. Also, I will add more of my book lists on this blog. More of my lists exist elsewhere at the moment.
I Am Not Afraid: Demon Possession and Spiritual Warfare, by Robert H. Bennett
I found that the following books are helpful but not that I agree with everything in the following books:
99 Answers to Questions about Angels and Demons and Spiritual Warfare, by B.J. Oropeza
Angels, Elect and Evil, by C. Fred Dickason
A book I just ordered but looked through it and like what I saw is: Wizards that Peep, A Journey Into the Occult, by Siegbert W. Becker