by Gray W. Wolfe
Zayden Peregrine, the professor trapped in Sigil, is now a marked man. His success battling demon cults has made him enemies across the City of Doors, especially within the powerful Factions. After his son, Michael, suffers a horrific psychological breakdown, Zayden risks everything, using science to launch a chaotic act of altruism that earns him the fatal wrath of the Harmonium. Arrested and threatened with execution, Zayden must trust his dubious allies to win a trial against fanaticism, even as a seductive demon stalks his family, intent on claiming Michael’s broken soul. In the Cage, where belief defines reality, Zayden must prove that reason holds its own weight.
