Ryan Miller (born 1974 in Albuquerque, New Mexico) is a writer who worked as a design director for the computer game company Cyan Worlds, founded by his brothers Rand and Robyn Miller. Ryan is credited with writing the initial draft of the Book of Atrus for Myst. He also received acknowledgment for helping develop the story lines in Book of Ti'ana, Book of D'ni, and Uru.
In 2004, Miller and his wife, Heidi, opened Mango Ink, a boutique greeting card company.
Miller self-published two novels, Inkarri (2003) and The Naked Fruit (2010). He lives in Spokane, Washington.