Secrets of Blackthorn Hall

Secrets of Blackthorn Hall by Cassandra Clare is out now, published March 17, 2026.

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Secrets of Blackthorn Hall
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Secrets of Blackthorn Hall Release Date: March 17, 2026

Published

Step into an illustrated Shadowhunters story, told through the letters, diary entries, and texts of beloved characters from the Mortal Instruments, Infernal Devices, Dark Artifices, and the Last Hours.

Shadowhunters Emma Carstairs and Julian Blackthorn are travelling the globe when the Clave orders them to clean up Blackthorn Hall, a crumbling Gothic fairytale mansion hidden away in Chiswick, London—or else the Clave will demolish it once and for all.

Amidst the clutter and disrepair, Emma and Julian discover secrets Blackthorn Hall has kept buried for years. Something (or someone…) else haunts the Blackthorn family’s cursed home.

With the help of their friends and family, Emma and Julian must restore the hall to its former glory and solve the mystery of the spectral presence which threatens any who interfere, while entertaining Shadowhunter visitors from both sides of the Atlantic.

Join beloved characters and fan-favourites in this lovingly illustrated epistolary adventure that bridges the gap between The Dark Artifices and upcoming The Wicked Powers series.

Originally serialized on Tumblr and funded through a hit Kickstarter campaign, Secrets of Blackthorn Hall is now in wide print distribution for the first time.

 

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[Average Rating: 5]

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Genre: Young Adult Fantasy

Cassandra Clare

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Book Club Journal: Reading Log For Adults & Kids Who Love Books!
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