Cohn is the bestselling author of numerous books for young adults, including the Gingerbread series, the Beta series, and, with David Levithan, "Nick & Norah's Infinite Playlist" (made into a movie starring Michael Cera and Kat Dennings) and "Dash & Lily's Book of Dares.” Her books have been named to Best-Of lists by Publishers Weekly, School Library Journal and Kirkus Reviews, among others. She lives in Los Angeles.