'Arna Greentower and her Old Tree Guesthouse are experiencing difficult times. Employees mysteriously disappear, deliveries go astray and business is faltering. Arna's foster-daughter Nisha, a fire magician, and her friend Tal are determined to uncover the secrets behind a forbidden room in the guesthouse and the memory-eating powers of its menacing occupant. But he is only one of Arna 's enemies. Former business rival and fugitive Gorv Vildish is back in Quentaris and looking for revenge.'
Source: The Quentaris Chronicles website, http://www.quentaris.com/books_nightmare.htm