"Nor Iron Bars a Cage...." by Randall Garrett is a science fiction novella written in the early 1960s. The story explores themes of criminal psychology and the justice system through a case involving a child's murder and attempts to rehabilitate potentially violent offenders. The narrative combines elements of police procedural and speculative fiction, creating a compelling examination of societal responses to crime and mental illness. The plot centers around Inspector Royall, who investigates the brutal murder of a young girl, Angela Frances Donahue. The story unfolds as Royall collaborates with his colleagues, including FBI agents and medical professionals, to track down the perpetrator. As the investigation deepens, the narrative delves into various sociopathic characters, illustrating the challenges law enforcement faces while tackling repeat offenders. In the backdrop, a unique psychiatric treatment program aims to rehabilitate violent criminals, with the hope of preventing future crimes. The novella ultimately raises profound questions about free will, morality, and the effectiveness of the justice system in dealing with those considered "zanies" or mentally unbalanced. (This is an automatically generated summary.)