Battlefield Earth – A Saga of the Year 3000 By L. Ron Hubbard – Pump Up Your Book Tours. Genre: Science Fiction, sub-genre: Alien Invasion, Classic Science Fiction, Space Opera, Military Sci-Fi, Adventure Sci-FI. 1,000 years after Earth has been decimated by an alien invasion, a young hero rises from the ashes and rallies the last survivors in an all-out rebellion for freedom that explodes across the continents of Earth to the cosmic sprawl of the Psychlo empire… Read interview and download some free chapters.