In addition to writing, Munn collected books and classic pulp magazines, including "Air Wonder Stories", "Amazing Stories", "Astounding" and other science fiction titles, along with "Argosy", "Argosy All Story", "Cavalier", "Weird Tales" (to the end of the Wright publication series), and others. Also in his library were self-manufactured books consisting of serialized stories extracted from magazines, notably works by George Allan England such as "Darkness and Dawn". About three fourths of his collection was ruined by exposure to weather during a relocation and had to be destroyed.