I read little publications in and around my church, a friend told me to find The Reason for God by Tim Keller and read. Haven’t been able to lay my hands on a hard copy, still searching for it online. Should be a great read.
“Two Powers in Heaven” by Alan F. Segal. Basically argues that ‘binitarianism’ was part of normative Jewish theology in the 1st Century. In other words, the idea that an angelic or hypostatic heavenly figure is equal to God predates Christianity.
“An Adversary in Heaven: Satan in the Hebrew Bible” by Peggy L. Day. Examines every passage in the Hebrew Bible that makes reference to השטן (lit. “the adversary”). There is also an nice appendix about the origin and meaning of the term “Beelzebub” in the New Testament. Unfortunately, this one might be kind of expensive.
Both of these books are very technical, which I’m sure is part of the reason they strike me as books that you would enjoy.
I don’t know if you are still doing much reading on the topics of mystical experiences, but I just heard of a book call “Kabbalah: A Neurocognitive Approach to Mystical Experiences” by Shahar Arzy and Moshe Idel. I haven’t read it but I heard it has some interesting information. I hope to check it out soon myself.