For anyone who fears Satan, the Devil, or demons, I highly recommend C.S. Lewis' The Screwtape Letters. I was taking confirmation lessons and mentioned my fear of demons to a canon who looked like Rasputin so double fear. The canon was legendary for being nice and scary at the same time. He said not to worry, read Screwtape. Lewis was a lay theologican of the Church of England who wrote articles, books, etc. around WWII. They are Christian classics.
Screwtape is a senior demon giving instructions to his nephew in the field, Wormwood, about how to defeat Our Enemy (God). They are so funny I cried laughing so hard. The theology is simple and elegant. I cherish the book so much.
If I had to name my top five books of all time, Screwtape would be on the list.
Lewis unWitnessed me. I never viewed the devil in the same light. Lewis warns that it is dangerous to take Satan seriously. His major point is that Satan and God are not equals. The battle was won before it ever started.
I've spoken to many within my church who believe that Jesus and Lucifer had to be good friends in heaven. They see reconciliation to God as the goal, not destruction.