T. Kingfisher 
What Moves The Dead 

An instant USA Today & Indie bestseller. Winner of the Locus Award for Best Horror Novel 2023. From the multi-award-winning author of The Twisted Ones comes What Moves the Dead, a gripping and atmospheric retelling of Edgar Allan Poe's classic ‘The Fall of the House of Usher.’
When Alex Easton, a retired soldier, receives word that their childhood friend Madeline Usher is dying, they race to the ancestral home of the Ushers in the remote countryside of Ruritania.
What they find there is a nightmare of fungal growths and possessed wildlife, surrounding a dark, pulsing lake. Madeline sleepwalks and speaks in strange voices at night, and her brother Roderick is consumed with a mysterious malady of the nerves.
Aided by a redoubtable British mycologist and a baffled American doctor, Alex must unravel the secret of the House of Usher before it consumes them all.

About the author

T. Kingfisher is the adult fiction pseudonym of Ursula Vernon, the multi-award-winning author of Digger and Dragonbreath. Perhaps best known for her children’s fiction, she is an author and illustrator based in North Carolina who has been nominated for the Ursa Major Award, the Eisner Awards, and has won the Nebula Award for Best Short Story for “Jackalope Wives” in 2015 and the Hugo Award for Best Novelette for “the Tomato Thief” in 2017. Her debut adult horror novel, The Twisted Ones, won the 2020 Dragon Award for Best Horror Novel, and was followed by the critically acclaimed The Hollow Places.