1866-1946 action adaptations adventure adventureandadventurers aladdin(legendarycharacter) britishandirishfiction(fictionalworksbyoneauthor) causas causes children'sfiction classicliterature comicbooks contrafáctico(lógica) counterfactuals(logic) diseases drama earth englishlanguage englishliterature englishsciencefiction examinations extraterrestrialbeings fantasy ficcion fiction fictioninenglish general graphicnovels guerra(filosofía) guerraespacial guerrasimaginarias human-alienencounters imaginarywarsandbattles imaginarywarsandbattlesinliterature invasions juvenilefiction largetypebooks lifeonotherplanets literature mars(planet) martians military novela open_syllabus_project openlibrarystaffpicks outerspace paz(filosofía) peace(philosophy) romanceingles sat(educationaltest) sciencefiction seresextraterrestres spaceopera spacevehicles spacewarfare strips studyguides teatro vocabulary war war(philosophy) warstories wells