The_Occult:_A_History by Colin_Wilson
Colin was a writer with tremendous insight into various subjects & topics.
https://www.kirkusreviews.com/book-reviews/colin-wilson-8/the-occult-a-history
Of course, various people have written many interesting books throughout history.
http://www.anathemabooks.com
http://syncnotes.blogspot.ca/2010/06/the-occult-intersection.html
