Surprised and disappointed that this inquiry has received so little response so far! Alas, I agree with Milton's recommendations and will provide a few other titles I have in this category, not all of which I have yet had time to read as I have not undertaken focused study on this topic yet but have explored the framework and resources in preparation. Currently caught up in Egypt...
Publications may have foundational backgrounding, history and theory or may focus on applied praxis, either as ritual instruction or personal practice journal. Depending on your aims and interests, one or all may be beneficial.
William G. Gray - The Tree of Evil see both appear out of print but obtainable
More info
informative video on Qliphoth by author
2022, well-received. I requested this book on WF here
Crowley's Liber 231 may be of direct interest; Liber 231, also known as Liber Arcanorum, is a text by Aleister Crowley that presents sigils and verses associated with the Qliphoth, often described as the "dark side" or inversions of the Sephiroth on the Tree of Life in Qabalah. Each of the 22 paths on the Tree of Life is linked to a corresponding Qliphoth. Liber 231 provides a framework for understanding these Qliphotic forces by presenting attributions for them, including their corresponding demons or spirits, and their unique characteristics.
Based on Crowley's Liber 231
Kenneth Grant and Linda Falorio are authors who have expanded on what Crowley developed:
Author is regarded by many; I have his Lamastu book and find his writing perplexing; copious research and a veneer of scholarly conventions but sorely needing a qualified editor. I could not finish Lamastu due to the writing.
Strange and interesting Tarot deck and guidebook; I actually use this deck in combination with another tarot deck. This approach has yielded positive results for me.
As mentioned, there is has been a steady stream of publications by other authors targeting Left-Hand Path approaches (Mason, Ford, Kerval, etc.). I have amassed a fair number of these publications and might consider light browsing these after I review some of the more foundational texts above to determine if any enhancements or add-ons might aid understandings and/or approaches.
I hope this topic receives more attention and you keep us informed of your progress.
