ISBN-13: 9781935150862 / Angielski / Miękka / 2017 / 208 str.
For centuries, the ceremonial evocation of spiritual beings has been Magic's darkest corner. But the simplest of Grimoires, the Heptameron of Peter de Abano, has escaped the attention of modern Ceremonialists. Its simplicity and power in summoning the Aerial Spirits is second to none. This book lays bare the operation of the Heptameron.