by Dion Fortune : A classic manual focused on detection and defense against "psychic attacks" and negative energies.

For those looking to start a practice, these modern ebooks offer more accessible entry points:

by Three Initiates : Focuses on Hermetic philosophy and is often cited as a "must-read" for a solid foundation in occult theory.

by Nikki Van De Car : An illustrated primer on crystals, horoscopes, and basic spells, often found on platforms like AudiobooksNow or Google Play.

by Aleister Crowley : A foundational text for the religion of Thelema and a comprehensive guide to his system of magick. Practical and Beginner-Friendly Guides

by Henry Cornelius Agrippa : A 15th-century encyclopedia that synthesized various magical systems and laid the groundwork for modern Western magic.