Horn grew up in Short Hills, New Jersey, and is a graduate of the University of Pennsylvania, where she was a columnist for the Daily Pennsylvanian. She holds a Master of Arts degree in English from New York University.
Horn’s debut novel was Help Wanted, Desperately. Horn’s sister, Dara Horn is also a novelist.
The book was reviewed in the Jerusalem Post
Horn, whose married name is Levenson, teaches English at the Dalton School on Manhattan's Upper East Side.