Dion Fortune's "The Mystical Qabbalah"
Agrippa's books of occult philosophyhttps://en.wikipedia.org/wiki/Three_Books_of_Occult_Philosophy
Look for explanations (golden dawn or thelema?) on the Lesser Ritual of the Pentagram
Can't think of anything entry-level, I like Jodorowsky's The Way of Tarot, but it's a big brick
Check all of that first, then move on to something more advanced
This is a good source for non-Hermetic Qabalah. It gave me a wider perspective.http://www.workofthechariot.com/TextFiles/Teachings-Introduction.html
My recommendations for starting out in Chaos Magick, in no particular order:
* Condensed Chaos by Phil Hine
* Advanced Magick for Beginners by Alan Chapman
* Liber Null by Peter Carroll
* The Psychonaut Field Guide by Bluefluke
* Principia Discordia by Malaclypse the Younger
* The Chicken Qabalah by Lon Milo DuQuette (beginner)
* A Garden of Pomegranates by Isreal Regardie (intermediate)
Chaos magick is cool but it seems like all the books on it are really basic?