"2012Z"^^ . "Sam Youd"@en . "Christopher, John"@en . . "John Christopher"@en . "2012-02-03Z"^^ . . . . "British writer" . . "Christopher Samuel Youd (professional nonfiction), John Christopher (science fiction), and several others"@en . "Sam Youd (16 April 1922 \u2013 3 February 2012), known professionally as Christopher Samuel Youd, was a British writer, best known for science fiction under the pseudonym John Christopher, including the novels The Death of Grass, The Possessors, and the young-adult novel series The Tripods."@en . . "1922-04-16Z"^^ . . "1922Z"^^ . "Youd, Sam (birth name); Youd, Christopher Samuel; Ford, Hilary; Godfrey, William; Graaf, Peter; Nichols, Peter; Rye, Anthony; Vine, William; Winchester, Stanley"@en . "n/88/288144" . .