The Chaldean Oracles are a collection of approximately 227 fragmented hexameter verses composed in the 2nd century CE, traditionally attributed to Julianus (also known as Julian the Theurgist) and his father, Julian the Chaldean. The text is a product of Hellenistic syncretism, blending Platonic philosophy with Persian, Babylonian, and Egyptian mystical elements. The Oracles are the foundational text for theurgy (ritual practices to unite with the divine), a term coined or popularized in these verses.

This copy is from the collection of Thelemic author Robert C. Stein (1931 – 2024), who wrote "The Mystery of the Letters and The Tree of Life" and other works. Stein was a Professor Emeritus of Biology in the New York State University System, whose involvement in the study and practice of Thelema spanned three decades and travels in five continents.