Sean Llewellyn Williams (born 23 May 1967) is an Australian author of science fiction who lives in Adelaide, South Australia. Several of his books have been New York Times best-sellers.

Williams was born in Whyalla, South Australia on 23 May 1967.^{[citation needed]}

He studied sciences and music at Pulteney Grammar School and matriculated third in his year (1984), topping the state for Musical composition. That same year, he won the Young Composer's Award for a theme and three variations for string quartet with flute, oboe and trumpet soloists called "Release of Anger".^[1]

He then went to Adelaide University and studied a Bachelor of Economics and wrote for the student newspaper On Dit. He completed a Master of Arts in Creative Writing at Adelaide University in 2005 and was in 2010 a PhD candidate at the same institution.^[1]

He is the author of over eighty published short stories and thirty-nine novels, including Twinmaker and (with Garth Nix) the Troubletwisters series. He has co-written three books in the Star Wars: New Jedi Order series. His novelisation of Star Wars: The Force Unleashed was the first novelisation of a computer game to debut at #1 on the "New York Times" bestseller list.^{[citation needed]}

Williams was Chair of the SA Writers' Centre from 2001 to 2003, and is one of only three lifetime members of that institution. Williams has also tutored for the Clarion South Workshop, was a previous winner of the Writers of the Future contest, and is now^[when?] a judge for the same.^{[citation needed]}

Williams is a multiple recipient of both the Ditmar and Aurealis Awards.^{[citation needed]}

• Doorways to Eternity (MirrorDanse Books, 1994)
• A View Before Dying (Ticonderoga Publications, 1998)
• New Adventures in Sci-Fi (Ticonderoga Publications, 1999) - Winner, Best Collected Work, 2000 Ditmar Award
• Light Bodies Falling (Altair Australia, 2007)
• Magic Dirt: The Best of Sean Williams (Ticonderoga Publications, 2008) - Winner, Best Collection, 2008 Aurealis Award

• "The Freezing of Sarah" (1997) in Bloodsongs #9
• "Entre les Beaux Morts en Vie (Among the Beautiful Living Dead)" (1998) in Dreaming Down-Under (ed. Jack Dann, Janeen Webb)
• "Hunting Ground" (2003) in Southern Blood: New Australian Tales of the Supernatural (ed. Bill Congreve)
• "haikaiju" (2005) in Daikaiju! Giant Monster Tales (ed. Robert Hood, Robin Pen)
• "daihaiku" (2005) in Daikaiju! Giant Monster Tales (ed. Robert Hood, Robin Pen)
• "The Tyranny of Distance" (2014) in SQ Mag, Edition 14 (ed. Sophie Yorkston)
• "The Legend Trap" (2014) in Kaleidoscope (Twelfth Planet Press) - Winner, Best Novella or Novelette, 2015 Ditmar Award
• Ghosts of the Fall
• White Christmas
• The Jackie Onassis Swamp-Buggy Concerto
• The Soap Bubble
• The Perfect Gun
• The Masque of Agamemnon (with Simon Brown)
• The Girl-Thing
• Star Wars: Or Die Trying (with Shane Dix)
• The Seventh Letter
• Midnight in the Cafe of the Black Madonna (Doctor Who)