The grisly 1947 murder of aspiring starlet and nightclub habitue Elizabeth Short, known even before her death as the 'Black Dahlia,' has over the decades transmogrified from L.A.'s 'crime of the century' into an almost mythical symbol of unfathomable Hollywood Babylon/film noir glamour-cum-sordidness. It is somehow fitting that author John Gilmore should be the one to unravel the multilayered mystery of this archetypal Los Angeles slaying as it begins to take its place in the collective memory, somewhere next to Bluebeard and Jack the Ripper, a cautionary tale about the pretty girl who came to Hollywood to be a movie star and wound up in a dirt lot, hacked in two.