Aliens, witches, and ghosts may seem like the stuff of nightmarish legends, but as author Terry Wells discovered, they are all too real.

In her eye-opening true account, Wells reveals some startling truths about what we know-and what we think we know-about the veil that separates life and death.

Wells began dabbling in the supernatural in her early teenage years. But what began innocently as an interest in astrology, about which she even wrote magazine articles, slowly morphed into an ability to communicate with the dead, which she pursued with the idea of helping...