From ancient Egyptians to modernday witches, King Solomon to Native American shamans, individuals throughout time have possessed the power to work with the spirit world. But it's not necessary to be a Tibetan holy man or ghost hunter to communicate with the other side. Everyone has friends beyond the veil, as author Christopher Penczak explains, "A spirit ally is a being in the unseen realms who, for whatever reason, decides to aid, befriend, protect,...