What Stalks the Deep

By T. Kingfisher

The next novella in the New York Times bestselling Sworn Soldier series, featuring Alex Easton investigating the dark, mysterious depths of a coal mine in America

Alex Easton does not want to visit America.

They particularly do not want to visit an abandoned coal mine in West Virginia with a reputation for being haunted.

But when their old friend Dr. Denton summons them to help find his lost cousin--who went missing in that very mine--well, sometimes a sworn soldier has to do what a sworn soldier has to do...

• Format: Hardcover
• Language: English
• ISBN: 1250354927
• ISBN13: 9781250354921
• Release Date: September 2025
• Publisher: Tor Nightfire
• Length: 192 Pages