William Peter Blatty talks literature, life after death and lousy movies

"Exorcist" author William Peter Blatty has a new book out. Titled "Finding Peter," it's part comic memoir, part argument for life after death. Blatty, a lifelong Catholic, lays out a number of curious incidents -- electric lights mysteriously flickering on and off, etc. -- that have convinced him that his son Peter, who died at age 19 in 2006, has been communicating with him from beyond the grave.