A few suggestions come to mind…
I’ve been wanting to re-read Eliphas Levi’s The History of Magic, so I’ll throw that one out.
James Eshelman’s Pearls of Wisdom would give us plenty to discuss about a wide variety of occult subjects.
I’m currently re-reading Francis Yates’ Giordano Bruno and the Hermetic Tradition, and could happily read it yet again. There’s a great introduction to Hermeticism and Renaissance magick generally, before a deep dive into Bruno, who is perhaps the first mage to comprehend the Body of Nuit.
We could read The Equinox Vol. 1 No. 1 — and who knows! maybe we’d get through all ten issues eventually.