The greater part of creation is invisible, alive, and at war all around you. How do you expect to fight an enemy you cannot see? This field guide to the unseen world offers practical advice for anyone looking to combat the spiritual forces of evil. Uncover the natures of angels and demons. Learn the truth behind ghosts, hauntings, succubi, marine spirits, and spirit animals. Understand how magic works, why it is insidious, and how to defend against sorcery. Discover the tactics of the enemy and the effective weapons anyone can use in the conduct of spiritual warfare.