Simply put, a mystery writer who solves actual crimes. After all, who better to unravel all the twists and turns of a mystery than someone who creates them for a living? Possibly a result of WriteWhatYouKnow.

Compare MostWritersAreWriters, InterdisciplinarySleuth. See also MysteryFiction and DetectiveFiction.
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!!Examples:

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[[folder:Anime & Manga]]
* The leads from ''KamenTantei'' kind of subvert this. Yes, they're mystery writers who investigate mysteries. But the female lead, especially, is a "fairplay" mystery writer living in a world where ghosts, psychic powers, "all a dream" endings and fictional characters come to life (including the title character) make it impossible to use logic and common sense to actually solve mysteries.
* ''Manga/DetectiveConan'': The protagonist's father is a mystery writer who occasionally steps in to solve mysteries when his son is stumped.
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[[folder:Comic Books]]
* Gabe Webb from ''TheMazeAgency''
* Kaye Daye, one of the [[Franchise/{{Batman}} Mystery Analysts of Gotham City]].
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[[folder:Film]]
* In the 1959 film version of ''Theatre/TheBat'', Cornelia is rewritten as a mystery writer renting the mansion for some inspiration, which she gets in spades.
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[[folder:Literature]]
* ElleryQueen
* AuthorAvatar Ariadne Oliver from various Creator/AgathaChristie novels
* Harriet Vane from the LordPeterWimsey novels is another example.
* A case could be made for [[Literature/{{SherlockHolmes}} Dr. Watson]], as he writes stories about the crimes he helps solve.
* In Chris Ewan's ''TheGoodThiefsGuide'' series, Charlie Howard is a thief who solves murders who has written several mystery novels about Faulks, a thief who solves murders.
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[[folder:Live-Action TV]]
* Jessica Fletcher from ''MurderSheWrote''
* ''Series/{{Castle}}''
* ''TheSnoopSisters''
* Temperance Brennan, from ''Series/{{Bones}}''. She writes mystery novels, and she also helps solve crime. Although her career as a forensic anthropologist is probably more important to her ability to solve crimes than her [[InformedAbility alleged skill as a writer]].
* [=McGee=] on ''Series/{{NCIS}}'' is a special agent, who wrote a best selling novel... that he would have preferred his coworkers never found out about. Later on, he was able to use his fame to get into a club that other undercover agents couldn't get in to.
* Maxwell Beckett ([[Series/TheEqualizer Edward Woodward]]) in ''OverMyDeadBody''
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[[folder: Radio]]
* Paul Temple from ''SendForPaulTemple'', plus its various spin-off films, television series, novels and comic strips.
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[[folder:Web Original]]
* Reggie becomes this due to the number of murders he helps solve in ''WebVideo/WhereTheBearsAre''.
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[[folder:Real Life]]
* A Real Life partial example might be Sir Arthur Conan Doyle. From The Other Wiki: "Conan Doyle was also a fervent advocate of justice and personally investigated two closed cases, which led to two men being exonerated of the crimes of which they were accused." See [[http://en.wikipedia.org/wiki/Arthur_Conan_Doyle#Correcting_injustice here]].
** Granted, Conan Doyle had actual forensic training, and he had been a detective and lecturer himself before writing the SherlockHolmes stories.
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