The Heptameron, also known as the Magical Elements of Peter de Abano, is a book written by the famous Renaissance philosopher and occultist, Henry Cornelius Agrippa. The book is a collection of seven treatises or chapters, each one dealing with a different aspect of magic and the occult. The first chapter discusses the nature of magic and its relationship to the natural world, while the second chapter focuses on the different types of spirits and...