Books by Stephen Flowers
I have two of his that I really enjoy and one of them is purposefully hermetic oriented.
I forget the exact title (its in storage at the moment) but its something like Hermetic Theory and Practice or the Postmodern Magical Papyri of Abaris"
It synthesizes alot of things in a very concise and clear way.

Hermeticism is, essentially, a popularized form of Theurgy - which, in turn, is a branch of Platonic philosophy. Both Hermeticism and Theurgy can be considered to be either:
(a) highly philosophical schools of magic
(b) highly magical schools of philosophy

Ioan Couliano's book "Eros and Magic in the Renaissance" does a pretty good job of showing the strong connection between Hermeticism and classical Greek philosophy - in particular the link between the Magic of Marsilio Ficino (who first introduced the Corpus Hermetica to those who are Greekless), and Plato's "Symposium".

The Symposium provides the theoretical (and theological) justification for the foundational formula of Hermeticism: "As Above, So Below".

If you want an authoritative but accessible introduction to Plato you can do no better than "What Is Ancient Philosophy" by Pierre Hadot.

Other good books on Ficino and Renaissance Philosophy/Magia (other than Couliano's) in general are:
Brian Copenhaver's "Renaissance Philosophy" (Copenhaver is also the author/editor/translator of the most commonly used English edition of the Corpus).
Frances Yates' "Giordano Bruno and the Hermetic Tradition"
D.P. Walker's "Spiritual and Demonic Magic"

For Plato's Symposium you really should get R.E. Allen's translation, which also has an extensive commentary. Also, Ficino's "Commentary on Plato's Symposium on Love" is available in English translation and is really a gold mine!

Hermetica: the greek Corpus Hermeticum - Brian P. Copenhaver

Try Gangaji

The books of Eliphas Levi translated by A.E. Waite as well as the writings of C. G. Jung. Both are vast, wide in the spectrum of information and study. Good luck and Blessed Be my brother.