Caryl Churchill, hailed by Tony Kushner as "the greatest living English language playwright," has turned her extraordinary dramatic gifts to the subject of human cloning--how might a man feel to discover that he is only one in a number of identical copies. And which one of him is the original. . . ? "Churchill's harrowing bioethics fable leaves us with a number of things to chew on." -Kris Vire, Time Out Chicago "A Number...