John Christopher
<s>Sam Youd (16. april 1922 – 3. februar 2012), poznat po književnom pseudonimu John Christopher, bio je britanski književnik, najpoznatiji po postapokaliptučnim science fiction romanima među kojim se ističe The Death of Grass i popularna omladinska serija The Tripods.</s>

<s>Vanjske veze
 
 
 The SYLE Press, publishing the novels of Sam Youd
 Biography at Penguin books website 
 Biography of Samuel Youd 
 Biographical sketch at ECampus.com
 Sam Youd family history
  John Christopher at the Encyclopedia of Science Fiction
 Obituary at Locus Magazine
 John Christopher obituary by Jo Walton
  John Christopher Obituary by Christopher Priest, The Guardian
 Obituary by Paul Vitello, New York Times
 Interview with John Christopher, Colin Brockhurst, 1999</s>

<s>Britanski pisci
SF-pisci
Pisci za djecu</s>

