OMG THAT IS NOT THE BOOK!
BUT because I started looking at that link and searching with other terms I FOUND THE ONE I WAS THINKING OF.
Okay, enough caps. :) Seriously, though! I was wrong about the title--it's actually True Magick. My 12 year old self has a terrible memory, apparently. At least the rest of my descriptions were correct.
Your description of the cover was even similar! I don't believe in coincidences so I really think I would not have found the book without your help.
You really don't know how much this means to me. This book was really the first exploration into anything spiritual and I haven't really thought of it over 20 years.
Thank you so much!
edit: please inbox me your email address, I have something for you!