Occult Novels you may never heard of:

The Red Lion - The Elixir of Eternal Life: An Alchemist Novel https://amzn.asia/d/cPIQuhg

Worth every penny. The Red Lion is an excellent meditation on the alchemical process and "Idealist Philosophy" all while being embedded in a narrative that spans multiple time periods.

It is excellent, and stands next to "Zanoni" and "Brother of the Third Degree" as one of the greatest Esoteric Novels of the West.