A Novel Idea (2005) is a romantic comedy about a teenager who starts a book club in Park Slope, Brooklyn. Friedman wrote one of the four stories in the holiday collection Mistletoe (2006), which also features stories by Nina Malkin, Hailey Abbott, and Melissa de la Cruz.
Friedman wrote a short story, "Three Fates" for the book 21 Proms. In 2007, Friedman published, along with artist Christine Norrie, a graphic novel entitled Breaking Up which details the complicated dynamics of junior year in an arts school in New York.