Malachi Martin was an Irish Catholic priest, theologian, and writer who became one of the most controversial religious commentators of the late twentieth century. A former Jesuit and professor at the Pontifical Biblical Institute in Rome, Martin left the priesthood in the 1960s and moved to New York, where he wrote extensively about the Catholic Church, exorcism, and Vatican politics. His bestselling works include "Hostage to the Devil," a chilling examination of possession and exorcism cases, and "Keys of This Blood," analyzing global power struggles involving the papacy. Martin died in 1999, leaving behind a provocative legacy of theological speculation and insider Vatican exposés.