"Lord of Shadows" is the second book in Cassandra Clare's The Dark Artifices series, set in the Shadowhunter universe. It follows the story of Emma Carstairs and Julian Blackthorn as they navigate their complex relationship while facing threats from both the Fae and the Shadow World. The novel explores themes of love, loyalty, and the consequences of choices. The plot thickens as the characters confront the looming danger of the Blackthorn family's past and the return of the Shadowhunters' enemies. As they seek to protect their loved ones, they must also grapple with their identities and the burdens of their heritage.