My group maintains a decent sized recommendation library here: http://orderoftheserpent.org/library.html
Additionally I wrote a book on the topic, which can be found here: https://www.amazon.com/Behold-Darkness-Complete-Introduction-Religion/dp/1793962340
Always happy to answer anything specific :)
Would an entire book suffice?
You might want to just read a ton of different stuff. Michael Aquino, Don Webb, Asenath Mason, Stephen Flowers, Doane Vera, Michael Kelley, Andrew Chumbley, Michael Ford, Jeremy Crow, Peter Levenda, Kenneth Grant, Daimonosophy, KHPR:voice of Darkness...
If you're looking into Setianism specifically I wrote a book specifically meant to be kind of a hand guide to all the scattered information. https://www.amazon.com/Behold-Darkness-Complete-Introduction-Religion/dp/1793962340
There's also the Order of the Serpent forum which tends be infinitely insightful if a bit slow, and the newsletters.
I wrote a book discussing not only the occult aspects of all this but the science and reasoning as well.
I'm also happy to answer any questions. I've been a Theistic LHPer got a decade plus and have published a book on the Prince of Darkness. Feel free to skim post history and such.