PLOT SUMMARY:

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…

GRADE: A

REVIEW:

This third installment in the Sworn Soldier series delighted me from the start—especially with its eerie West Virginia setting. One of the things I adore about Kingfisher’s work is how she blends dark, gnarly horror with just the right amount of humor, and this book is no exception.

Like the previous entry, What Stalks the Deep introduces a cast of quirky, compelling characters and builds a mystery that pulls you in deeper with every chapter. Following Alex Easton on another wild adventure was a blast, and the shift into the claustrophobic world of the mines adds an extra layer of tension. Mines are unsettling on their own—add Kingfisher’s imagination, and they become downright terrifying.

The audiobook deserves special praise. The performance brings the atmosphere, characters, and creeping dread vividly to life. Honestly, I think it may be the best way to experience this story.

If you’ve enjoyed the earlier books in the series, this is an absolute must-read. It expands the world in exciting ways, leans into cosmic horror with a hint of sci-fi, and delivers another gripping, weird, wonderful journey with Easton at the helm.

*Thank you so much to NetGalley & Macmillan Audio for the audiobook copy of this book in exchange for an honest review!

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