In the hot weather at the height of the Long Vacation, solitary don Dr. Wiston observes his colleagues Born and Thomas conducting experiments in ESP on a room overlooking the college court. The devil finds work for idle hands and Dr. Wiston, with nothing better today, invites the melancholy Born to a sinister meal at which he introduces a darker element to his innocent colleague's unconscious. Now Born is haunted by the black stone mirror, the Devil's Looking-Glass, once owned by - among others - the Elizabethan magus Dr. John Dee. As Thomas loses control of his subject to Wiston, events move helter-skelter to a terrifying climax in the British Museum. Cover art by Alan Powers.