1866-1946 action adaptations adventure adventureandadventurers britishandirishfiction(fictionalworksbyoneauthor) children'sfiction classicliterature comicbooks diseases earth englishlanguage englishliterature englishsciencefiction examinations extraterrestrialbeings fantasy fantasyfiction ficcion fiction fictioninenglish general graphicnovels guerra guerraespacial guerrasimaginarias human-alienencounters imaginarywarsandbattles imaginarywarsandbattlesinliterature invasions juvenilefiction largetypebooks lifeonotherplanets literature magic mars(planet) martians military novela open_syllabus_project openlibrarystaffpicks outerspace princesses revolutions romanceingles sat(educationaltest) sciencefiction seresextraterrestres spaceopera spacevehicles spacewarfare strips studyguides vocabulary war warstories wells