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Susan Mary Cooper (born 23 May 1935) is a British fantasy author, best known for ''Literature/TheDarkIsRising'' series. Her other novels include ''The Boggart'' and ''King of Shadows''.
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!!Works by Susan Cooper with their own trope page include:

* ''Literature/TheDarkIsRising'' series

!!Other works by Susan Cooper provide examples of:

* BeethovenWasAnAlienSpy: It's never made clear exactly what's going on with [[spoiler:Richard Burbage/Babbage]] in ''King of Shadows'', but it's definitely something supernatural.
* HauntedTechnology:
** In ''The Boggart'', the boggart possesses a computer.
** In ''The Boggart and the Monster'', the boggart possesses an ROV searching for the Loch Ness Monster.
* HistoricalDomainCharacter: [[ShakespeareInFiction William Shakespeare]], Richard Burbage, and others in ''King of Shadows''.
* IntergenerationalFriendship: In ''King of Shadows'', 11-year-old actor Nat is transported back in time to 1599, where he forms a loving friendship with 33-year-old William Shakespeare. Nat's father killed himself and Shakespeare's son died at Nat's age, which is why they are drawn to one another.
* LoverAndBeloved: Heavy subtext in the relationship between Shakespeare and the protagonist in ''King of Shadows''.
* {{Poltergeist}}: The title character of ''The Boggart'' is a mischievous invisible creature who lives in a castle in Scotland and plays pranks on the inhabitants, including the traditional poltergeist tricks. It's said that creatures like him live all around the world, and are known by different names in different cultures. One of the novel's minor characters is a parapsychologist who believes in the 'troubled adolescent' theory of poltergeist activity, and makes a nuisance of himself trying to prove that one of the Boggart's human friends is the source of the disturbances.
* SelkiesAndWereseals:
** Her picture book ''Selkie Girl'' recounts a traditional selkie legend from Ireland.
** ''Seaward'' features characters who turn out to be selkies.
** ''The Boggart'' and ''The Boggart and the Monster'' contain allusions to the selkie legend, although all the seals who actually appear in the novels are, as far as the reader ever learns, just seals.
* StockNessMonster: ''The Boggart'' has a passing mention that the Loch Ness Monster is another shapeshifting boggart, explaining how it's lived so long and why nobody can find it when they go looking. In ''The Boggart and the Monster'', the boggart and his human friends help Nessie, who has become trapped in his giant lake monster form, evade a scientific expedition trying to prove his existence.
* ThisIsAWorkOfFiction: ''The Boggart'' has a note at the front stating that the boggart's castle, the neighboring town, and the theatre where the protagonists' father works are inspired by real places, but that the characters are entirely fictional, except for the theatre manager's dog.
* TrustBuildingBlunder: In ''King of Shadows'', a JerkAss drops the hero in the falling-backward exercise... and is promptly bawled out by the director and kicked out of the group on the spot.
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