Manly P. Hall’s The Secret Teachings of All Ages is an essential book in any library. It is an encyclopedia of all things esoteric, and includes detailed knowledge of Hermeticism, Ancient Greece, Druidism, and much more.
The Emerald Tablets was written 36 o00 years ago by Thoth, and is one of the primary books in the philosophy of Hermeticism. It is a fairly light read in that the book is small, though the strange poetic nature of the written will surely affect your mind.
This book was compiled by scholars nearly 2000 years ago, and is a collection of writings by Hermes Trismegistus. Because most of what Hermes wrote was lost in history, this is one of the primary books on Hermeticism, and an essential read for those who want to learn the teachings of Hermes Trismegistus.
The Kybalion was written in 1908, and attributed to “3 Initiates”. It is my favourite source on the Hermetic Principles, and provides a detailed description of each of the seven, which are mentalism, correspondence, vibration, polarity, cause and effect, and gender.