Inspired by C.S. Lewis, Laurie wrote her first novel at twelve. Her determination to become a fantasy novelist led her to take a typing class and all the writing classes she could. After attending a small Christian college for two years, Laurie transferred to Brown University to finish her degree. After graduating, Laurie roamed around for a few years living in many different places during this time.
In 2003, her novel Fire Logic, the first in her Elemental Logic series, won the Gaylactic Spectrum Award for "best novel"; in 2005 Earth Logic, the second in the series, won the same award. She teaches writing at the University of Massachusetts Boston and lives with Deb Mensinger. In 2004, Marks and Mensinger married in Massachusetts.