39 Clues Crossovers
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The Doctor's Many Companions-On Titanic by 1bluesapphire
Travelling with the Doctor? What an exciting and dangerous thing to do. Sapphire Stone is more than eager to travel with him, and friends, especially to the Titanic, where such a journey on an ill-fated ship brings to light secrets about a school friend that she never thought possible.
Crossover - Doctor Who & 39 Clues - Rated: T - English - Mystery/Supernatural - Chapters: 1 - Words: 1,511 - Favs: 1 - Follows: 1 - Published: 3/18 - [Alistair O., Irina S.] 10th Doctor, OC
The Ice Queen and Smokescreen by godgirl13 reviews
She's on the field. He's still at school. She's jelous. He's in way over his head. What happens next?
Crossover - Spy School series & 39 Clues - Rated: T - English - Romance/Family - Chapters: 2 - Words: 1,056 - Reviews: 9 - Favs: 1 - Follows: 1 - Updated: 3/13 - Published: 2/17 - [Erica H., Benjamin R./Ben] [Amy C., Dan C.]
The Bloody Git and the Pirating Wankers by Lapulta J.R.R. Cahill reviews
In which Thomas learns four-lettered words, exactly how to infuriate a fairy, and that all nations are equal. (But some nations are more equal than others.) :: language warning
Crossover - 39 Clues & Hetalia - Axis Powers - Rated: T - English - Adventure/Drama - Chapters: 5 - Words: 41,379 - Reviews: 15 - Favs: 2 - Follows: 2 - Updated: 3/6 - Published: 2/28/2014 - Thomas C., England/Britain, Scotland
PJO and 39 Clues fanmail by 1davey29 reviews
fanmail!
Crossover - Percy Jackson and the Olympians & 39 Clues - Rated: K+ - English - Chapters: 5 - Words: 977 - Reviews: 25 - Favs: 2 - Follows: 3 - Updated: 1/20 - Published: 11/12/2010 - Complete
Of Dragons and Cahills by The Wizard Rider reviews
Amy and Dan Cahill are somehow transported to Berk, trying to find a rare Clue that no-one but Grace Cahill knew of. But now, they are being tailed by a pack of power-hungry Cahill relatives… and the Vikings are meant to help Amy and Dan find this lost, lost Clue. But CAN they, or will the other teams stop them? Rated T coz I'm crazy. Set after HTTYD 2.
Crossover - 39 Clues & How to Train Your Dragon - Rated: T - English - Adventure/Mystery - Chapters: 4 - Words: 5,380 - Reviews: 4 - Favs: 1 - Follows: 1 - Updated: 12/26/2016 - Published: 10/19/2016 - Amy C., Dan C., Hiccup, Toothless
The Great Battle by TrueTeal reviews
This is an adventure like no other for Percy and the 7. They meet a lot of new people, and demigods at that! This is an Epic adventure for them all! It is several small quests/adventures leading up to the Big War. Kronos and Gaea are back, WITH ALLIES, INCLUDING THE ONE, OPAL KOBOI, AND SCORPIA, WHICH IT'S HIGH RANKING OFFICERS INCLUDE THE VESPERS, PLUS ISABEL KABRA, WHO OWNS ITEX!
Crossover - Percy Jackson and the Olympians & 39 Clues - Rated: K - English - Chapters: 61 - Words: 42,808 - Reviews: 57 - Favs: 6 - Follows: 9 - Updated: 12/1/2016 - Published: 1/16/2015
Percy Jackson : The Leader of the Lucians by Mr Dionysus Fantastic Fan
Crossover series : Percy is unknowingly given the Lucian serum by Vikram Kabra. After Vikram dies, no one knows about Percy being given the serum. Percy because leader of the Lucians along with lan Kabra.But what happens when Annabeth is an Ekaterina ...
Crossover - Percy Jackson and the Olympians & 39 Clues - Rated: K - English - Romance/Humor - Chapters: 1 - Words: 336 - Favs: 1 - Follows: 2 - Published: 8/6/2016
Lucian by Gray Jedi 4000
The Force isn't the only thing that's odd about Anakin's family...
Crossover - Star Wars & 39 Clues - Rated: K+ - English - Suspense - Chapters: 1 - Words: 233 - Follows: 1 - Published: 7/28/2016 - Anakin Skywalker, Obi-Wan K., Padmé Amidala
Ian Jackson and the Olympians by Krystal Cahill-2014 reviews
This is my first story so plz read. The Cahill's go on a reunion and read the Percy Jackson and the Olympians the lightning thief. But theirs a twist... PJO characters are replaced with the Cahill's. Amian Hamead Teagan Nedison
Crossover - Percy Jackson and the Olympians & 39 Clues - Rated: T - English - Chapters: 4 - Words: 10,420 - Reviews: 18 - Favs: 3 - Follows: 4 - Updated: 7/20/2016 - Published: 6/21/2014 - Amy C., Ian K., Jonah W., OC
Harry Potter and the Physician's Cure by TrueTeal
Voldemort. Demigods. Quests. THE School. The Flock. A Clue Hunt to save the ones they love. All wrapped up in an neat little package. Read to find out how it all ends!
Crossover - Harry Potter & 39 Clues - Rated: K+ - English - Adventure/Fantasy - Chapters: 1 - Words: 174 - Favs: 1 - Published: 6/24/2016
Cahills at Hogwarts (Even Chapters) by 1bluesapphire reviews
A story collaborated by me and my best friend Kat. I do the even number of chapters, whilst she does the others. Hope Cahill is eager to study at Hogwarts school, but as soon as she gets there, she'll learn that the world of Wizards is more complicated than she thought. Rated T to be safe.
Crossover - Harry Potter & 39 Clues - Rated: T - English - Fantasy/Humor - Chapters: 5 - Words: 3,836 - Reviews: 4 - Favs: 3 - Follows: 2 - Updated: 2/26/2016 - Published: 9/4/2015 - Arthur T., Hope C., Irina S., Isabel K.
A Cahill Reunion, With A Twist by Cayloeforever35 reviews
We have another reunion on our hands, and this time there are surprise guests?
Crossover - Percy Jackson and the Olympians & 39 Clues - Rated: T - English - Humor/Romance - Chapters: 2 - Words: 772 - Reviews: 6 - Favs: 1 - Follows: 1 - Updated: 2/24/2016 - Published: 9/12/2015 - [Will S., OC] Amy C., OC
Cahills at Hogwarts by Arashi Nao reviews
Collaboration between me and 1bluesapphire!:) Hope Cahill is eager to study at Hogwarts school, but as soon as she gets there, she'll learn that the world of Wizards is more complicated than she thought. (my summary sucks, read the story for more:)) Rated T to be safe.
Crossover - Harry Potter & 39 Clues - Rated: T - English - Fantasy/Humor - Chapters: 5 - Words: 4,454 - Reviews: 5 - Favs: 2 - Follows: 1 - Updated: 2/21/2016 - Published: 9/3/2015 - [Arthur T., Hope C.] Isabel K., Irina S.
saving the world by tdfan12
the 39 clues and total drama characters come to together to save the worl.
Crossover - Total Drama series & 39 Clues - Rated: K - English - Chapters: 6 - Words: 273 - Updated: 2/3/2016 - Published: 9/16/2015
Florida Vs Demigods and Cahills by TrueTeal reviews
The title explains it all: it is a court case with Annabeth, Piper, Amy, and Laura as the defendants in a 1st degree murder and grand theft auto case. And, wouldn't you know? Their defense counselor is non other than Ben Matlock.
Crossover - Percy Jackson and the Olympians & 39 Clues - Rated: K+ - English - Mystery/Crime - Chapters: 1 - Words: 127 - Reviews: 2 - Published: 1/20/2016
The Gallagher Clues by KookieLuver reviews
The Interpol ask for help from none other than the Gallagher Girls to help catch a couple of criminal kids... Dan and Amy Cahill. This is a crossover of The Gallagher Girls just after "I'd tell you I love you, but then I'd have to kill you", and an almost completely changed "In Too Deep". I do not own these series. My first FanFic. R&R. I'd appreciate it... Enjoy! :)
Crossover - 39 Clues & Gallagher Girls - Rated: K+ - English - Mystery/Adventure - Chapters: 6 - Words: 3,295 - Reviews: 21 - Favs: 9 - Follows: 14 - Updated: 1/5/2016 - Published: 4/30/2013 - Amy C., Dan C., Cammie M., Bex B.
Saving Demigods by Demon Escapee reviews
So, Basically the kids from the clue hunt are demigods. Its happened before but not like this. They are going to us both of their abilities to save stuff. Sorry for OOCness. I'm only one person. This is T mainly for language. Read and Review.
Crossover - Percy Jackson and the Olympians & 39 Clues - Rated: T - English - Adventure/Romance - Chapters: 2 - Words: 1,210 - Reviews: 4 - Updated: 1/1/2016 - Published: 12/30/2015
39 Clues: Clueless by RowanEx reviews
Dan Cahill becomes the Anchor of the new Infinite Time Loops branch, the 39 Clues! Will that stop the Cahills from taking the clues when the Loopers know all 39 Clues before the hunt even begins? PS: Revision underway.
Crossover - 39 Clues & X-overs - Rated: K+ - English - Sci-Fi/Humor - Chapters: 3 - Words: 11,369 - Reviews: 1 - Favs: 12 - Follows: 5 - Updated: 12/15/2015 - Published: 8/14/2015 - [Dan C., Amy C.] Nellie G.
Paths Carved in Stone by QuayJaquelinXeomaraZendaya reviews
Amy, Percy, Jason, and Hazel head to New Orleans to find the hostages and maybe bring down the Vespers while they're at it. They find and enter the stronghold easily enough, but can they manage to navigate and escape it too? Their quest will force them to face their fears, test their limits, and find out if any of the hostages are still alive by the end of it.
Crossover - Percy Jackson and the Olympians & 39 Clues - Rated: T - English - Adventure/Friendship - Chapters: 7 - Words: 8,001 - Reviews: 25 - Favs: 4 - Follows: 10 - Updated: 11/22/2015 - Published: 9/24/2015 - Percy J., Amy C.
Reading Percy Cahill: PJO by HeyYouYaYou reviews
Percy Cahill Jackson. That's right Cahill. Percy's Amy & Dan's adopted half-brother (on his mom's side of course). But they (and other Cahills) are taken to a room to read the PJO series. How will everybody react? Note: I do not own anything but the plot & the twist.
Crossover - Percy Jackson and the Olympians & 39 Clues - Rated: K+ - English - Humor/Friendship - Chapters: 4 - Words: 2,037 - Reviews: 8 - Favs: 11 - Follows: 18 - Updated: 10/26/2015 - Published: 6/15/2015
The Collision of the Two Worlds by NRK reviews
What happens when the two different worlds surprisingly collide. Alliances and friendships are formed or will hatred ensure the fall of both worlds while fate runs it's course.
Crossover - Percy Jackson and the Olympians & 39 Clues - Rated: K - English - Friendship/Hurt/Comfort - Chapters: 14 - Words: 13,063 - Reviews: 18 - Favs: 8 - Follows: 16 - Updated: 10/7/2015 - Published: 6/26/2014 - [Annabeth C., Percy J.] [Amy C., Ian K.]
Prophecy Of the Milinium by TrueTeal reviews
Annabeth and Piper are kidnapped, and Percy and Jason have no idea what to do. The Flock is attacked and Angel is captured. Amy Cahill is kidnapped, along with Maggie Rose and Micheal Goldberg. Angel manages to escape and is able to lead to the rescue of those who were kidnapped, but also eventually leads to the downfall of the Vespers and Gary Soneji.
Crossover - Percy Jackson and the Olympians & 39 Clues - Rated: K+ - English - Adventure/Crime - Chapters: 2 - Words: 1,592 - Reviews: 1 - Follows: 1 - Updated: 10/5/2015 - Published: 9/29/2015
Percy Jackson and Amy Cahill by Percy39games reviews
Amy isn't a demigod and Percy isn't a Cahill,but can Amy see through the mist?
Crossover - Percy Jackson and the Olympians & 39 Clues - Rated: K+ - English - Adventure/Romance - Chapters: 1 - Words: 39 - Reviews: 6 - Favs: 1 - Follows: 4 - Published: 6/28/2015 - [Percy J., Amy C.] [Annabeth C., Jake R.]
Black Stash by TimeLady31415 reviews
The Black Stash, a weapon so powerful it could destroy the universe, was left with the Madrigals. Now, Red Skull wants it. One girl was given the secrets to find it, and Red Skull has her. Worse, she's the Avengers' adopted daughter.
Crossover - 39 Clues & Avengers - Rated: K+ - English - Adventure/Suspense - Chapters: 1 - Words: 415 - Reviews: 1 - Favs: 1 - Follows: 1 - Published: 6/23/2015
Timeless by Prodigy411 reviews
When Gideon developed the Infinity Ring, the SQ had kept an eye. But now, the worlds crossed, so can they fix this?
Crossover - 39 Clues & Infinity Ring series - Rated: T - English - Chapters: 1 - Words: 270 - Reviews: 1 - Follows: 1 - Published: 4/22/2015
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