Keeper Of The Children: William H. HallahanIn a child's bedroom in a suburban Philadelphia home, Edward Benson is listening for footsteps on the stairs. The footfall Edward is waiting for will not be human. It could be someone's pet cat, or a stuffed teddy bear, or a smiling marionette doll. But whatever it is that comes creeping up the stairs will have two qualities: it will be animated by a terrifying, diabolical force, and it will have only one intention murder. If Edward Benson wants his