Science fiction 18 Survival 8 Time travel 7 Extraterrestrial beings 6 Imaginary wars and battles 6 Television programs 6 Contests 5 Interpersonal relations 5 Talking books 5 Betrayal 4 Fiction 4 History 4 Insurgency 4 Life on other planets 4 Magic 4 Teenage girls 4 Astronauts 3 Competition (Psychology) 3 Dragons 3 Dystopias 3 Families 3 Fantasy 3 Kings and rulers 3 Man-woman relationships 3 Poverty 3 Space warfare 3 Survival skills 3 Totalitarianism 3 Voyages and travels 3 Young adult fiction 3 Ability 2 Artists 2 Assassins 2 Book burning 2 Brain 2 Brothers and sisters 2 Dent, Arthur (Fictitious character) 2 Dune (Imaginary place) 2 Fantasy fiction 2 Friendship 2 Genetic engineering 2 Girls 2 Good and evil 2 Human-alien encounters 2 Identity 2 Imaginary places 2 Interplanetary voyages 2 Large type books 2 Loyalty 2 Monsters 2 Orphans 2 Political fiction 2 Prefect, Ford (Fictitious character) 2 Prophets 2 Psychic ability 2 Revenge 2 Schools 2 Science fiction, American 2 Scientists 2 Sisters 2 Social classes 2 Soldiers 2 Spirit possession 2 Stars 2 Teachers 2 Twenty-first century 2 Utopias 2 Virtual reality 2 War games 2 War stories 2 World War, 1939-1945 2 Adoption 1 Adventure and adventurers 1 Adventure stories 1 Air warfare 1 Alchemy 1 Americans 1 Amerikanisches Englisch 1 Amusement parks 1 Archaeologists 1 Armed Forces 1 Atlantis (Legendary place) 1 Audio Cassette 1 Audiobooks 1 Billionaires 1 Billionaires -- Fiction 1 Biological invasions 1 Boarding school students 1 Books and reading 1 Bounty hunters 1 CHR 1996 1 Capitalism 1 Censorship 1 Children's Books - Young Adult Fiction 1 Científicos 1 City and town life 1 Collisions with Earth 1 Coma 1 Comets 1 Competition 1