"Run, Little Monster!" by Chester S. Geier is a science fiction novella written in the early 1950s. This tale explores themes of survival and identity in a post-apocalyptic world, where societal changes and the aftereffects of a devastating war have resulted in the emergence of individuals—like the protagonist, Fran—who exhibit extraordinary abilities due to radiation exposure. At its core, the book delves into the struggles of a young girl facing persecution and her journey toward self-discovery amidst fear and danger. The story follows Fran, an orphaned girl living with the abusive Big Luke Becker and his troubled sons, Sammy and Davey. As Fran experiences an emotional and physical transformation into womanhood, she discovers that she is one of the "changed" children born after an atom bomb devastated cities, endowing her with unique powers. While being hunted by her tormentors, she encounters Tom, a voice whispering guidance and support. As the tension escalates with her pursuers closing in, Fran learns of her abilities and her connection to others like her—eventually revealing that "Tom" is actually Davey, who has been hiding his own powers. The story culminates in Fran's escape to a ruined yet safe urban landscape where she can thrive among the other changed children, symbolizing hope for a new beginning in a world that fears them. (This is an automatically generated summary.)