As a writer, Kirn has published a collection of short stories and several novels. These include Thumbsucker (1999), which was made into a 2005 film featuring Keanu Reeves and Vince Vaughn.
As an author, Kirn has released a compilation of brief narratives and multiple novels. One such work is Thumbsucker (1999), which was later made into a 2005 movie starring Keanu Reeves and Vince Vaughn.