Sean Williams is an Australian science fiction and fantasy author. He has contributed to ''Franchise/StarWarsLegends'' (including parts of ''Literature/NewJediOrder'', and the novelisations of ''VideoGame/TheForceUnleashed'' and ''The Force Unleashed 2''). His own works include the Evergence trilogy (co-written with Shane Dix), the Books of the Change trilogy, the Changeling trilogy, and the standalone novel ''The Resurrected Man'', among others.

!!Works with their own trope pages include:

* ''VideoGame/TheForceUnleashed'' series
* ''Literature/NewJediOrder'' series: ''Force Heretic'' trilogy, co-written with Creator/ShaneDix
* ''Literature/SpiritAnimals'' series: ''Blood Ties'', co-written with Creator/GarthNix

!!Other works provide examples of:

* AnAstralProjectionNotAGhost: [[spoiler:Adi's ghost]] in the Changeling trilogy.
* BrainUploading: One of the spin-offs of the teleporter technology in ''The Resurrected Man''.
* ColourCodedTimestop: In the ''Astropolis'' series, the subjective passage of time can be altered by most individuals through a process called overclocking. When a character is overclocking to move at an accelerated rate, the spectrum of light becomes red-shifted for that person (and blue-shifted if they choose to slow down their subjective perception of time too).
* DestructiveTeleportation: The consequences of a particular teleportation system, called "d-mat", are explored in depth in the novel ''The Resurrected Man'', the short stories collected in ''A View Before Dying'', and the YA ''Twinmaker'' series. It is a destructive teleportation system, where the original is scanned to create data called a "pattern", which is used to create an exact copy of the person in another location. Everything about the person is the same, down to their thoughts, feelings, and memories, so that those who come out of the booth believe themselves to be the same person who stepped in it. ''The Resurrected Man'' is the origin of the phrase "Murdering Twinmaker", which in the novel is both a nickname for the teleporter and the nickname for a serial killer who uses the data in the sending teleporter to create his own copies, which he murders for pleasure.
* EldritchAbomination: In ''The Books of the Cataclysm'', the Big Bad is Yod, a tree-like god or eldritch abomination that inspired the myth of Yggdrasil the World Tree. Yod has almost completely consumed the universe and it is only in one single time-stream that Yod hasn't totally devoured the cosmos.
* FalseFriend: [[spoiler:Ros's friend Escher]] in the Changeling trilogy.
* FantasticNoir: ''The Resurrected Man'' is a noir detective novel in a future world with teleporters and artificial intelligences.
* {{Golem}}: Several appear in the Changeling trilogy.
* GrandTheftMe: The villain of the second book in the Changeling trilogy.
* IKnowYourTrueName: The power of true names is a recurring concern in the Changeling trilogy.
* LightspeedLeapfrog: In "On the Road to Tarsus", a group of colonists is sent by long-range {{teleportation}} to the planet Tarsus, thirty light years from Earth, which means the teleporter signal will take thirty years to get there. While it's still en route, someone back on Earth invents [[SubspaceAnsible FTL communication]], cutting the journey to a matter of days and allowing another group of colonists to be sent and the colony established years ahead of schedule. As the story closes, the planet is preparing itself for the imminent arrival of the original colonists-to-be.
* NonHumanNonBinary: In ''The Resurrected Man'', one of the supporting characters is an AI, who doesn't identify as having a gender and is referred to using a distinct set of pronouns.
* ScienceFantasy: ''The Books of the Cataclysm'' series takes place 4000 years into our future. The end of the world had been averted in contemporary times, when the world had unmasqued and hero twins altered reality so that an Eldritch Abomination, Yod, couldn't destroy the cosmos. But the only way they could achieve this was to pick a time-line where they were able to imprison Yod. The result is a mish-mash world where remnant modern technology is adjacent with magic.
* SpaceOpera: The Evergence trilogy.
* SubspaceAnsible: In the "d-mat" stories, the creation of one of these opens up the possibility of practical interstellar travel. (The teleporter signal had previously been limited by the speed of light, meaning that even a trip to a nearby solar system would take several years each way.) This is most prominently a plot point in "The Road to Tarsus".
* TimeStandsStill: The ''Astropolis'' series features both this trope and its inversion, of a sort, with the advent of Overclocking. Most individuals have the ability to alter their relative perception of time, meaning that their relative movement etc will increase as well. This means that a person perceiving time normally would see only blurs moving around them as people overclocked in the same room. (The inversion is that the overclocking can run the opposite way: a person who reduces their "tempo", or a normal "tempo" from the perspective of an overclocking person, will be perceived to be moving incredibly slowly, if not at all, although they are in fact simply operating at a much lower relative speed.) However, moving when overclocking is extremely damaging to the body; bones can be broken by bumping into a wall, or landing badly, and the friction of movement can ignite clothes and materials. Light becomes red- or blue-shifted, too, so this one is actually pretty realistic, relatively speaking.
* TrueSight: In the Changeling trilogy, Adi gains this after [[spoiler:she dies and is revived]], being able to see through illusions and see spirits.
* {{Twinmaker}}: The "d-mat" teleporter system featured in various novels and short stories works by breaking the person who steps into it down into little bits of data called a "pattern" and then using the pattern to create an exact copy of the person in another location. Normally the original is destroyed and a single copy is created, but there's at least one story where the safeguards are circumvented and the end result is multiple copies of one of the characters.
* WhenTreesAttack: In ''The Books of the Cataclysm'', the Big Bad is Yod, a tree-like god or EldritchAbomination that inspired the myth of Yggdrasil the World Tree.
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