Police Operation
- शैलियाँ: Science fiction
- भाषाएँ: English
- प्रदाता: Librivox
- कीमत: $0.00
- रेटिंग:
H. Beam Piper (1904–1964) was an American science fiction author. He wrote many short stories and several novels. He is best known for his extensive Terro-Human Future History series of stories and a shorter series of "Paratime" alternate history tales. (Summary from Wikipedia)