Containing much previously unpublished work, Mark Dirt includes spreads from Morrisroe's punk zine Dirt ("he sort of invented the Boston punk scene," Jack Pierson later recalled of his friend), as well as correspondence and notes by the artist, sketches and even his last will and testament. All of these documents have been assembled by Morrisroe's longtime partner Ramsey McPhillips, and represent the most complete survey of the artist's non-photographic works.