Chain of Thorns

Cordelia Carstairs has already lost a great deal. Her father has been murdered, her plan to become parabatai with Lucie Herondale has been destroyed, and her marriage to James Herondale is falling apart. A bond with the ancient demon Lilith also strips her of her strength as a Shadowhunter.

Tatiana Blackthorn has escaped the Adamant Citadel, and Belial, a Prince of Hell, now menaces London. Suspicion falls on the Herondales while the city's Shadowhunters pull together against outsiders. Cordelia and James have to work out how to stop him, even though their marriage is in ruins.

Matthew Fairchild, James's parabatai, is caught in a love triangle with the two of them. The strain it puts on the bond between the two men runs through the whole book.

This is young adult fantasy set among the Shadowhunters of Edwardian London, with romance running alongside high stakes. It is the third and final novel in The Last Hours, following Chain of Gold and Chain of Iron.

Readers who have not read those two will be coming in at the end of the story. Margaret K. McElderry Books published it in January 2023, and the unabridged audiobook is read by Finty Williams.