Henry 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. He wrote under the name H. Beam Piper. Piper did not live to see how influential he was to other science fiction writers. In this book: The Cosmic Computer Omnilingual Murder in the Gunroom Space Viking Little Fuzzy Four-Day Planet He Walked Around the Horses The Edge of the Knife Day of the Moron Genesis Time and Time Again A Slave is a Slave The Mercenaries Last Enemy Police Operation Crossroads of Destiny Flight From Tomorrow The Answer Naudsonce Graveyard of Dreams