Hello everyone, I've been reading some Harry Potter/Percy Jackson crossovers and I was disappointed to find out that most of them had very few chapters, so I decided to write one myself. This is Percy, Annabeth and Grover going to Hogwarts to help defeat Voldemort. This is currently after the Titan War, so Harry and the other students are starting their fifth year and Percy, Annabeth, and Grover are 15 almost 16. Now sit back, relax, and enjoy the fanfiction!

Disclaimer: I don't own Percy, Harry, or any other HP or PJO characters.

Chapter One

Percy's P.O.V.

I was sitting, staring at the lake with Annabeth under my arm. "Do you think we get a break now?" I asked her.

She glanced at me curiously. "You mean a break from the fighting?"

I nod, "Since we defeated Kronos and all." I looked at her, and saw she was in deep thought.

"Maybe... I hope so." she murmured. I nodded, silently agreeing with her.

"PERCY!" I turned to see Will Solace, son of Apollo.

"Yeah?" I called back.

"Chiron wants to see you and Annabeth," Will told me, arriving next to us.

I frowned. "Any idea why?"

Will shrugged, "Not really, but he seemed pretty secretive." He smiled at us before walking away. I started to get up and Annabeth followed me."Well, I guess we'll find out." I said to Annabeth, who agreed with me. I realized that Will hadn't told me where Chiron was, but I headed to the Big House anyway. I entered with Annabeth and he gave us a warm smile.

"Hello Percy, Annabeth." he gestured for us to sit down. We took a seat and I noticed that Grover was sitting there also, chewing nervously on his fingernails.

"Grover! What are you doing here?" Annabeth exclaimed and Grover gave us a hesitant smile, but ignored her question. I faced Chiron, giving him a questioning look.

He sighed. "I have a quest for you three."

My mouth dropped open. "Another one?"

He nodded grimly. "Yes, are you up to it?" he asked, concerned. I glanced at my friends, who nodded at me.

"Yeah," I told Chiron.

He smiled at me. "Great. Now, instead of a prophecy, I'll tell you what you are supposed to do for a change. Have you ever herd of wizards and witches?" he questioned.

I frowned. "No... other than fairy tales." I admitted.

Chiron smiled. "Well, there are such things as wizards and witches and the kids ages 11 through 17 go to a school called Hogwarts."

I couldn't help but snicker a little at the name. "A hog with warts." I muttered and my girlfriend punched my shoulder. I glared at her, but she glared at me even more fiercely.

Chiron continued as if that little scene hadn't just happened. "These wizards and witches live in fear of an evil and powerful wizard named Voldemort, but many are too scared to say his name so they refer to him as, You-Know-Who or He-who-must-not-be-named. You're task is to protect Harry Potter."

I blinked. "Who's that?"

Annabeth rolled her eyes at me. "He's a wizard trying to fight Voldemort obviously."

I glared at her. "Oh sorry I'm not that smart." I muttered.

Chiron smiled a little at our dispute. "My friend, Albus Dumbledore is the headmaster of Hogwarts and if you have any worries, he is trustworthy."

I sighed in relief. "Good thing we know that at least someone is trustworthy."

Annabeth sighed, turning back to Chiron. "And what do we tell them?"

"That you come from a magical camp who trains special wizards and witches." Chiron responded.

I scrunched my brow. "But they'll guess that's a lie. I know a good lie, and that's not a good lie." I pointed out.

"When they confront you, tell them the truth,but you have to make friends with them first." Chiron looked at all of us one at a time.

Grover raised his hand. "So, where are you sending us?"

"England, to the Burrow."

"The... Burrow?" Annabeth looked confused.

"Harry Potter's friend's house, Ron Weasley. Harry's parents were killed by Voldemort when he was one." Chiron said sympathetically. Percy winced, nodding his head sadly. Annabeth looked shocked while Grover grimaced.

The son of Poseidon suddenly shot up. "Better get going, then."

Harry's P.O.V.

I heard Ron thundering up the stairs into the room where I was lying in bed. Ron flung the door open. "Mate, did you hear?" My best friend grinned widely, sitting on the edge of the bed.

"No, what is it?" I asked eagerly. Maybe it was a new teacher or Snape got sacked or something along those lines.

"There are some wizards and a witch coming to Hogwarts from a special wizard and witches camp!"

I blinked at him. "Transfer students?" I asked, thinking I hadn't heard right.

"Yeah! We can be friends with them and show them around and stuff!" Ron said enthusiastically.

"But... what if they're Slytherin?" Ron opened his mouth, but no words came out.

The door opened and Hermione entered. "So? It doesn't matter. They could be in Griffindor, Slytherin, Ravenclaw, or Hufflepuff." she pointed out.

"But they must have a Sorting Hat there! Or a Sorting Scarf or whatever. What if they ARE in Slytherin? Malfoy could turn them against us!" I was getting annoyed as Ron and Hermione shared an amused look.

"Oh stop worrying, Harry! We can just ask them. They are supposed to be here any minute." Just as Hermione spoke, there was a knock on the door. We all perked up. "Do you think..." Hermione trailed off and we all got up and ran out of the room, hurried down the stairs and Ron flung the door open. Three people, two guys and one girl looked at us, startled. I got a good look at them. One of the guys had black hair and green eyes, like me, but instead of an emerald green, it looked more like a sea-green. The girl had curly blonde hair that went past her shoulders and stormy grey eyes. The last guy had curly brown hair, brown eyes and a wispy goatee. They all looked surprised at having the door flung open in their faces.

"Uh... hi. I'm Annabeth Chase and these two are Percy Jackson and Grover Underwood." Annabeth pointed to the two as she said their name.

"Hello, I'm Harry Potter and this is Ron Weasley," as I gestured to Ron, he waved, "and Hermione Granger." Hermione smiled at them and they returned it.

We stood there awkwardly and Annabeth broke the silence. "So, can we come in?"

"Oh yeah, sure." I hastily stepped aside, blushing. They stepped in, closing the door. Percy shouldered his backpack. I glanced at it. "You can put your stuff in your room. Here, I'll show you guys." I walked up the stairs, glancing behind me to make sure that the visitors were following me. I went up to a room and let them go inside. It had two bunk beds. Percy and Grover put their stuff by one bed while Annabeth put hers by another. "Dinner will be ready pretty soon, so you guys can come down and play chess with us." I offered.

Annabeth smiled gratefully at me. "That would be great, thanks." She looked at Percy, who didn't seem to want to go. "Come on!" she told him, but he shook his head.

"I don't know how to play chess." he informed me.

Annabeth rolled her eyes. "You can watch then." She grabbed him by the ear and started to drag him down to where Ron and Hermione were sitting, downstairs. I exchanged a look with Grover, and we both smirked, following them down. This is going to be hilarious, I thought silently.

There we go! I know it's not the best start, but I'm warming up to the whole fanfiction thing! Please review, constructive criticism welcome!

-PJOFanatic101