What Stalks the Deep

About “What Stalks the Deep”

What Stalks the Deep is a 2025 horror novella written by Ursula Vernon under the pen name T. Kingfisher. It is the third book in the Sworn Soldier series. The story includes elements inspired by the shoggoth, a fictional creature from H.P. Lovecraft’s At the Mountains of Madness. The novella is part of a larger series and draws on themes from Lovecraftian horror. (Summary adapted from Wikipedia, CC BY-SA 4.0.)