Dark Matter maps the invisible dimension of theater whose effects are felt everywhere in performance. Examining phenomena such as hallucination, offstage character, offstage action, sexuality, masking, technology, and trauma, Andrew Sofer engagingly illuminates the invisible in different periods of postclassical western theater and drama. He reveals how the invisible continually structures and focuses an audience's theatrical experience, whether it's black magic in Doctor Faustus, offstage sex in A Midsummer Night's Dream, masked women in The Rover,...