Salem Village, Massachusetts, winter 1692. Two young girls, Betty Parris and Abigail Williams, use magic to foretell who they will marry. Within days, both girls display the telltale signs of witchcraft possession. For the next fifteen months, witchcraft accusations, trials, and executions spiral out of control. Nineteen "witches" are hanged, and one is pressed to death. At the eye of the storm stands Cotton Mather, a prominent Boston pastor. During the trials he advises the Salem judges. Afterwards he defends them in his book, The Wonders of the Invisible World. It will be Mather's consummate theological explanation of Salem's dark hour, and it will seal his historical fate. Contemporaries will attack him; subsequent historians will castigate him, largely ignoring his theology in Salem trial studies. A World of Darkness is the first work to utilize Mather's theological beliefs as a lens to interpret the Salem witchcraft trials. It asks the question, "What can Mather's seventeenth-century Puritan theology tell us about the Salem witchcraft episode?"