The Bierbaums entered the world of professional comic book writing through Legion
fandom. Tom Bierbaum grew up as a Legion fan, first becoming exposed to the characters via
Adventure Comics #310 (July 1963). Meanwhile, Mary Gilmore became a serious Legion fan in the late 1970s. Early on in their relationship, the Bierbaums wrote stories together, their first published piece being a Halloween-themed short story for a local newspaper which was a Legion of Super-Heroes story with the characters' names and situations changed.
Keith Giffen and early writing work Recognizing the Bierbaum's devotion to the Legion, Giffen contacted them, at first using them as a sounding board for his ideas about the Legion. == Writing method ==