* Orson Scott Card: Known for science fiction works like *Ender's Game* and *Speaker for the Dead*. He has won numerous awards and his books have been adapted into movies and video games.
* Terry Tempest Williams: A renowned essayist, poet, and environmentalist. She is known for her work on nature, spirituality, and social justice, such as *Refuge: An Unnatural History of Family and Place*.
* Stephenie Meyer: Author of the wildly popular *Twilight* series, which has sold millions of copies worldwide and been adapted into several films.
* Brandon Mull: Author of the fantasy series *Fablehaven* and *Beyonders*, popular among young adult readers.
* Christopher Paolini: Author of the *Inheritance Cycle*, an epic fantasy series popular with young adults, including the *Eragon* film.
* John Fowles: Although born in England, he lived in Utah for a time and is known for his literary novels, including *The Magus* and *The French Lieutenant's Woman*.
Ultimately, the "most famous" author from Utah depends on your personal preferences and criteria for fame. Each of these authors has made significant contributions to literature and has achieved a high level of recognition within their genres.