R oy brought a friend home to play. A bright, articulate boy, he and Roy appear to be a good match. They like to throw things and catch them. They are both strongly in favor of rolling down hills, whenever the opportunity might present itself. And they prefer running to walking if given a choice. During the course of their time together, an unexpected visit from a neighborhood friend changed the rollicking dynamic. It was almost instantly apparent that Roy’s two friends were either of a mind to mate with or to murder one another. Their chemistry was toxic. Two children who’d never set eyes on each other ten minutes prior were throwing beans at each other, trying to drop things down the other’s…