Allyn's "The Prisoner" gives readers a glimpse into life on the planet of Olrona. We are introduced to the Pegaseans, whose advanced evolution has allowed their survival for thousands of years despite an unforgiving terrain and constant threats from rival species. For all their talents, adaptations, and advanced social and governmental structures, they find themselves at the mercy of an ancient entity who refuses to negotiate with anyone other than Maria, a young woman who arrives in the city of Pegasea unexpectedly on the last transport ship from Earth.