Over the period of several terrifying months, the Mannheim family was caught in a titanic struggle while physicians, psychiatrists, and clergy fought for the soul of their child against a power that identified itself with Satan. In POSSESSED, acclaimed author and journalist Thomas B. Allen reveals what he found in the priest's diary as well as his interviews with witnesses to the exorcism of Robbie Mannheim. The evidence Allen uncovered in his investigations is so shocking, so chilling and so totally credible, it will challenge everything you believe -- or don't believe -- about the forces of good and evil.