If you're interested to lean more about evil and demonic possession, watch a real video on an exorcism
bit.ly/cwG3fP . Listen also to prominent Catholic theologian and exorcist Fr. Malachi Martin on The Nature Of Evil, Exorcism & Possession
bit.ly/bZqbrb .Additionally you can also watch this documentary
alturl.com/ctzmm showing a real exorcism in the Philippines.
Fr. Gabriele Amorth, Rome's chief exorcist's book is also worth a read. This milestone book is a great resource on demonology and diabolic possession. Read here
alturl.com/hj58k about how one can get possessed and how to protect yourself and your family against witchcraft, spells, demonic influences etc.