Disclaimer: I do not own either Harry Potter or Percy Jackson etcetera etcetera.

Chapter 1

Percy's POV

When I got to the Big House, everyone was already there; gathered around the ping pong table.

There was Annabeth, sketching new plans for Olympus; Malcolm who was reading an engineering book; Travis and Conner had their heads together discussing winged shoes; Katie was idly making a flower grow near the window while watching Travis in the corner of her eye; Clarisse was there glaring at everyone while sharpening her spear (it was her 3rd); the Solace twins were listening to music, Alessandra's fingers tapping in sync with the music; Leo was there fiddling with whatever was in his hands, his hands moving at an incredible speed; Piper was there talking with Rachel; Pollux was eating grapes waiting for the meeting to begin. Thalia was present as well, not looking very happy to be there, she probably was called away from the Hunters as she was still wearing her Hunter garb. The shadows darkened and Nico stepped out. He had grown taller and more intimidating since I last saw him. He sat down in the chair next to me and idly toyed with his sword.

Chiron cleared his throat and all activity was silenced.

"You all wonder why I have gathered you here today," he said and everybody nodded.

"There is an alternate world in which there is a society that, long ago, Hecate blessed with magic. This community has developed on its own. They have several schools of magic, one of them being Hogwarts,"

At the name "Hogwarts" all of the boys cracked up and started laughing. It was obvious that the girls were trying to hide their amusement.

"This society is currently facing hard times. They are on the brink of a Wizarding War. Nothing in the magnitude you have all experienced but they need our help anyway. One mortal with the blessing of Hecate has gone corrupt and power crazy. Going by the name of Voldemort, He believes that those not of "wizarding" descent does not deserve magic. As a result, he attempted to purge that society of all "muggle-borns" (their term for it). He was thwarted from his rising success by a little baby boy. This baby boy, whose name is Harry Potter, managed to reflect the Killing Curse back at him. However, he has risen again and is causing serious trouble. The ignorant leaders of their government, including their soon-to-be Defense against the Dark Arts professor- Dolores Umbridge, try to deny that he has come back. But he has, make no doubt on that. Our assistance is needed to protect Harry Potter as well as the students of Hogwarts. Voldemort will try to take over the school and we must stop him. With our assistance, Voldemort will fall within a year."

"As times are tough there, I am sending the cabin leaders there to assist them. Both the Greeks and Romans will go; the Romans are waiting for us. Rachel will be there as well if any prophecy suddenly arrives. I must stress that this is an undercover assignment. Nobody is to know of your true heritage. You are also to carry your concealed weapons with you at all times. Just because you are in an alternate world does not mean that monsters will cease to attack. May the Gods be with you?"

We were given an hour to pack before we were to take the portal to Camp Jupiter and from there flying a chartered plane (shudder) to London, England.

I took necessities, Riptide, the shield which Tyson remade for me, a few casual changes of clothes, a pouch of drachmas (to contact the camps) and my leather bead necklace.

I shouldered my dufflebag and went out to meet the rest of the crew.

We stepped into the portal which transported us to Camp Jupiter.

Reyna, Jason, and Octavian greeted us there. Hugs went around. "We will be taking Jason and I, Hazel, Frank, Dakota, Bobby, Gwen, and Marcus for the Romans." Reyna said. "Octavian will step in to lead Camp Jupiter and will contact us if necessary. Lupa told us that all our supplies are already bought and will be waiting for us when we arrive."

We all said our final goodbyes and we stepped on the (ginormous) chartered plane that will fly us to London, Hogwarts.

Fingers crossed.

A/N: Hope you like the story so far! In the upcoming chapters, the PJO gang's age may not coincide with that of Hogwarts but I am allowed a little artistic license. Just a teaser: They will be arriving in the Golden Trio's fifth year and it will be revealed that all is not what it seems within Hogwarts, much to the Golden Trio's surprise.