"The Penal Cluster" is a captivating science fiction novel written by Randall Garrett. The story is set in a future in which mankind has colonized other star systems and explores the concept of justice and rehabilitation in a high-tech, interstellar society. The plot centres around the Penal Cluster, an isolated region of space in which planets serve as prisons for convicted offenders. Instead of traditional incarceration, these planets provide a...