New York Times veteran investigative journalist Ralph Blumenthal’s first book on the subject of UFOs is about the charismatic, and controversial Harvard physiatrist John Mack. “The Believer: Alien Encounters, Hard Science, and the Passion of John Mack,” which hits store March 15, vividly tells the story of a man unafraid to tackle the unexplained. Mack, a Pulitzer Prize-winning author, professor and the head of the department of psychiatry at Harvard Medical School, was predominantly known in the UFO field for his research that showed compassion, and helped garner mainstream attention to the abduction experiencer phenomena.