Top 10 Long Mystery Fanfics
Ranked by AO3 kudos. Each fic is tagged with mystery and falls in the 50,000–100,000 words range.
Running on Air
by eleventy7
Draco Malfoy has been missing for three years. Harry is assigned the cold case and finds himself slowly falling in love with the memories he collects.
At Your Service
by Faith Wood (faithwood)
Hogwarts students are in danger; Harry is determined to save them all. There's only one thing he knows for certain: Draco Malfoy is somehow involved.
With or Without You
by KouriArashi
Derek thinks that the mating rituals are overly romanticized bullshit, but claiming a mate and defending them from challengers is something werewolves do, and his pack can't afford to appear weak after the fire. Especially not when Deucalion and his friends are in town for the rituals. Enter Stiles
Another monster
by Oddornot
Dead for centuries, you were reborn. Into a body you didn't know and into a place unknown to you. Once your nice life gets ruined, you have to fit in as best you can. Would you make it? Another take on my book, Two and a half outlaw. Later version of Owen is based of the fab version that belongs to
The sound of Trees
by Whashaza
There was a legend of old. Telling a story of the four travellers that will come through the gate. We waited for eons for the bell to toll. Winters came and went with the regularity of seasons. Woman gave birth and men grew old, yet our King and his knights lived, waiting for the day that will deter
Iwatodai Moonlight
by Hawkfire
Amamiya Ren was six years old when he lost his family to metal and fire, a tragedy birthed under a sickly green moon. Nearly a decade later, an unexpected scholarship to Gekkoukan High brings him back to the city where he lost everything but his life. Things in the Port Island aren't what they seem,
Would I lie to you?
by Avocadofairy
Nearly four years have passed since Adora left Horde High and her childhood best friend Catra behind and moved to the other side of Etheria, thinking she would never see her friend again. She worked her way up to the very top then, getting accepted at the best college in Bright Moon. Everything goes
Dearest Sherlock, Love Molly XXX
by therinian
Girls are turning up dead around London. After a disastrous Christmas Party, Molly goes missing. She's forced to take part in the crimes. Sherlock has riddles to solve, and while their friends believe Molly's innocent, Sherlock, for some reason, does not. Expect MANY chapters.WARNING: Violence in ma
Rift in Normalcy
by TheRoyalStoryTeller
[You live in some bargain-bin alternate reality. No meteors, no trolls, no video game apocalypse with your name on it. Just you, a loser, grinding through high school drama like it’s endgame content. No heroes. No villains. No tragic sacrifices. Just normalcy. And you’re totally fine with that. Tota
Agatha Booklust's stolen body
by AelDoh
Waking up in first year at Hogwarts in the same year as Harry? Excellent! Thinking that her actions could influence the events of the saga and result in Voldemort's victory? Horrible. But Agatha can't help but defy the rules, because she isn't Agatha. She seems to have stolen her body, and she wants
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About Mystery
Something is wrong and someone must work out what: disappearances, ciphers, impossible crimes, and secrets with bodies attached. Mystery fic includes whodunits, slow-unraveling secrets, and stories where the reader solves alongside the characters.
A fair-play mystery makes the reader a participant, and fandom's deep character knowledge makes the misdirection more fun — you know these people, and you're still wrong.
Common scenarios: A small-town disappearance that the visiting protagonist can't leave alone, or an inheritance with conditions that get stranger the closer anyone looks.
About This List
This list of 10long Mystery fanfics spans 725,957 total words. Kudos range from 23 on the newest entries to 71,189 on the most established. Most entries are ongoing works, so subscribe on AO3 for update notifications. The most common rating is Teen And Up Audiences (6 of 10 fics).
Recurring tags across this list: Mystery · Slow Burn · Drama · Friendship · Romance.
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