Hiron Ennes is an American writer, musician, and pathologist.
Ennes began their first novel, Leech, on a novel-writing course after graduation. It was published in 2022 by Tor as part of a two-book deal and won the 2023 British Fantasy Award for Best Newcomer. Their second novel, The Works of Vermin, was published by Tor in 2025.
Ennes's areas of medical interest include infectious disease, pathology, and anti-capitalist healthcare reform. Ennes works as a pathologist and plans to move into forensic pathology.
Leech has been described as "a combination of Gothic horror and science fiction" and by Ennes themselves as "post-post-apocalyptic soft-sci-fi gothic body horror". Ennes's literary influences include Diana Wynne Jones and Dune from childhood; the horror settings of Gormenghast, Dracula, Frankenstein, and The Phantom of the Opera; novelists Samuel R. Delany, China Miéville, Sofia Samatar, and José Donoso; and the French-language writers Blaise Cendrars, Comte de Lautréamont, and Henri Barbusse.
Ennes plays the harp and is very fond of dogs. They consider themself to be "queer in every sense of the word" and use they/them pronouns.