The Magic and Philosophy of Trithemius of Spanheim is a book written by Francis Barrett that delves into the teachings of Johannes Trithemius, a German abbot and scholar who lived in the late 15th and early 16th centuries. The book contains two of Trithemius' most important works: The Book of Secret Things and The Doctrine of Spirits.In The Book of Secret Things, Trithemius discusses the nature of magic and its relation to the divine. He explores...