For as long as Lucie Herondale can remember, the Herondale family manor has adjourned the manor of the Blackthorns. It’s too bad that Tatiana Blackthorn, the matriarch of the family, has always been, as her father Will Herondale says, “mad as a mouse trapped in a teapot.” Since the day that her father Benedict murdered Tatiana’s husband, and was killed in turn by a group of Shadowhunters that included both her brothers, Tatiana has nursed a burning grudge against the London Institute and all its inhabitants, especially Will, Tessa and their children: Lucie and her brother, James…