. . . . . . . "Children"@en . . . . "Alien Citadel"@en . "Alien Citadel" . "Finn, captured by the cruel Slavers at last, learns the truth about these alien rulers of Earth and the monstrous secret of the Citadel." . . "Fiction"@en . . . "Ciudadela alienigena"@es . . "Alien citadel"@en . "Alien citadel" . . . . .