Chain Of Iron by Cassandra Clare

Set in early 20th-century London, a tight-knit group of young Shadowhunters races to uncover the truth behind a string of murders and a growing conspiracy that threatens their community; as secrets, betrayals, and unexpected alliances surface, loyalties are tested and forbidden romances complicate their fight against ancient and supernatural dangers, forcing each character to confront painful choices about love, duty, and sacrifice.

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