Absolutely not, thought Pastor Don Basham when another pastor suggested evil influences might be causing turmoil in his church and failures in his ministry. But after more troubling and perplexing problems, Basham began to discover he was wrong.

In this page-turning account, Basham chronicles his reluctant journey from disbelief to acceptance in the existence of demonic spirits. More than a story, he imparts what he discovered about demons, the difference between infestation and possession, and how to engage in spiritual...