Cassandra Clare signing Secrets of Blackthorn Hall in London

Event details

16 Mar
2026
@
5:00 pm
Forbidden Planet Megastore

New York Times bestselling author, Cassandra Clare, will be in the UK in March to sign her latest Shadowhunter instalment.

Cassandra Clare will be signing new release, Secrets of Blackthorn Hall, on Monday 16 March from 17:00 at the Forbidden Planet Megastore in London. Tickets are limited and can be purchased online.

Please note that only copies of Secrets of Blackthorn Hall and copies of the Kickstarter campaign editions will be signed as we want to make sure every ticket holder gets time with the author.

Shadowhunters Julian and Emma from The Dark Artifices series move to London to fix the crumbling Blackthorn Hall, only to find letters and secrets from Shadowhunters who came before them.
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