From the Publisher:
As Elizabeth tells her story, so the tragic events that took place at the House of Stairs 20 years before are revealed. She tracks Bell Sanger down and renews her acquaintance, with terrifying results. Barbara Vine also wrote "A Dark-Adapted Eye" and "A Fatal Inversion".
Barbara Vine: The House of Stairs. Penguin, ISBN: 0140114467 (May, 1989), 288 p., £6.99