Apart from EA Koetting and the other BALG authors, I’d recommend anything published by the Gallery of Magick.
I’ve copied my personal reading list below. A lot of these I’ve added just by noting down any titles I’ve seen recommended around this forum. Enjoy.
To begin:
- Demons of Magick - Gordon Winterfield
- Mystical Words of Power - Damon Brand
- Archangels of Magick - Damon Brand
- The Kybalion - Three Initiates
- The Miracle of New Avatar Power - Geoff Gray-Cobb
- Liber Null & Psychonaut – Peter J. Carroll
More nerdy/theoretical/system-agnostic stuff:
- The Apophenion – Peter J. Carroll
- Reality Transurfing - Vadim Zeland
- Quantum Psychology - Robert Anton Wilson
- Prometheus Rising - Robert Anton Wilson
- The Law and the Promise - Neville Goddard
- Psycho-Cybernetics, A New Way to Get More Living Out of Life - Maxwell Maltz
- The Game of Life - Florence Scovel Shinn
More: (click to expand)
Other:
- Sigils of Power and Transformation - Adam Blackthorne
- The Complete Book of Demonolatry - S. Connolly
- Magickal Servitors - Damon Brand
- Inner Alchemy - Taylor Ellwood
- Space/Time Magic - Taylor Ellwood
- The Angels of Love - Zanna Blaise
- Magickal Seduction - Damon Brand
- Magickal Attack - Gordon Winterfield
- Magickal Protection - Damon Brand
- 72 Angels of Power - Damon Brand
- Words of Power - Damon Brand
- Greater Words of Power - Damon Brand
- Magickal Cashbook - Damon Brand
- Wealth Magic - Damon Brand
- New Energy Ways - Robert Bruce
- Shapeshifting - John Perkins
- Telecult Power - Reese P. Dubin
- Soul Traveller - Albert Taylor
- Living Thelema - David Shoemaker
- The Science of Being Great - Wallace D. Wattles
- The Science of Getting Rich - Wallace D. Wattles
- The Forbidden Parapsychology - Jose M. Herrou Aragon
- The Four Agreements - Don Miguel Ruiz
- Meditations - Marcus Aurelius
- The Neville Goddard Collection - Neville Goddard
- Belial - Without a Master compendium - E.A. Koetting, Kurtis Joseph
- Creating Magickal Entities - David Michael Cunningham
- The Goetia of Dr. Rudd - Stephen Skinner, David Rankine
- Drawing Down Belial - S. Connolly