Marcy's short fiction has been widely published and anthologized, appearing in McSweeney's, Guernica, The Indiana Review, Lenny Letter and elsewhere. Her essay "Maybe I Loved You" appeared in the best-selling anthology Goodbye to All That: Writers on Loving and Leaving New York.
Marcy has received fellowships from The MacDowell Colony and The Edward Albee Foundation. She is the winner of the Smallmouth Press Andre Dubus Novella Award and Story Magazine Carson McCullers short story prize. Powell's Bookstore named Marcy a Writer to Watch Out For. Marcy received her Bachelor of Arts at Haverford College and her Master of Arts at the Center for Writers at the University of Southern, Mississippi. She lives in Montclair, New Jersey with her daughter Nina.