AR/PJ Crossover.

~Alex~

Throughout my entire existence, I have only heard lies. The life I thought was real was actually a lie as well. Sure, I was still a spy for MI6, but I was something else as well. Since I first started working for Military Intelligence, I realized I was leading a double life. One part was the normalcy of a schoolboy; the other, an agent. Why can't I be just a regular teenager? I sighed as I walked down the street. A loud crash came from behind me and I had to wait for the dust to clear before I could see. A boy, about eighteen, stood in front of a monster. In his hand was a sword. I stood there for a moment, confused. What is that? Why does that boy have a sword? Am I hallucinating? The boy jumped to the side as the monster attacked, but it changed direction in a split second and slammed the boy into the pavement, pinning him down with one hand. The sword fell the ground a few feet away from me, then disappeared. Then, the sword stabbed through the monsters hand and the boy was free. In his hand was the sword. I wanted to run, but I also wanted to stay and watch. Curiousity eventually overruled my common sense and I stayed. Further down the street a dog ran toward the monster and the boy, then it started to change into a huge, ugly creature. It lunged at the boy, who was too busy fighting the other monster.

"Watch out!" I yelled and started to run toward the battle. The boy turned too late and the dog creature pinned him to the ground with its claws piercing skin. I could smell the stench of both monsters, but I jumped onto the dog creature's back while resisting the urge to vomit at the stench. The monster began to attempt to throw me off its back and eventually succeeded. The oxygen was knocked out of my lungs, but I moved, just in time, when the other monster nearly stepped on me. I jumped to my feet and noticed the boy stood beside me.

"Get out of here!" He yelled.

I shook my head, "Are you crazy? You'll be killed!"

"I've done this for years, just trust me!"

"No way." I stated. Then, a sixth sense warned me something was going to happen. "We have to get out of here."

"Look, it's our mission to get rid of these monsters." The boy replied, "You're a mortal, so you won't understand right away. Just go home, now."

I shook my head again, "No." He glared at me, but I continued to talk. "I'm not just an ordinary... mortal, or whatever it was. I'm not like the others."

"Other than the fact you can see Greek monsters, what else-" He was broke off by me pushing him to the pavement. The dog creature would have killed the boy if I had not reacted, but its claws hovered an inch above my face. My hand had its paw blocked, but the weight was beginning to break my arm. I growled in frustration and kicked upward with all my strength. Nothing happened, the monster stayed where it was. Then, it soared straight into the air, pushed by water. At my feet, a manhole was erupting water. Then, the boy controlled the water and brought the dog creature to his level. It was over in one stab and the monster disentegrated into golden dust. I stood up, cradling my right arm, and noticed the other monster was dead as well. The boy put a cap over the tip of the blade and it shrunk into a pen. "You okay?" He asked.

I nodded, "Who are you?"

"Percy Jackson. You?"

"Alex Rider."

He nodded, "You need to get your arm fixed. Unfortunately, I ran out of ambrosia and nectar a few days ago."

"Are you going to tell me exactly what happened or do I have to guess? I know you said you were on the mission, but who else is? And why did you call me a 'mortal'?" I asked.

He shook his head, "You ask a lot of questions. First of all, have you ever heard of the Greek myths? The ones with the gods, goddesses, and monsters? Well, they are not myths; they're real. I am half human and half god along with many other people. They are the ones that are on the mission as well. Lastly, you're a mortal because your parents are probably normal."

"My parents are dead. I never knew them." I stated.

He nodded in understanding, "Now it's my turn to ask a question. What did you mean when you said you were not like normal mortals?"

"Classified." I automatically replied, then thought about it. This guy just told me he was a demigod, so can I tell him I'm a spy? "It's a long story that I would rather not go into."

"Well, then, I have to go before people begin to see what happened here." He looked around for a moment, "Are there any cheap hotels here?"

"You don't even have a place to go? Fine, you can stay at my uncle's house." I replied and began to walk away, but Percy did not follow, "That is... unless you want to stay out in the cold weather." This time, he followed me.

There was a few minutes of silence before Percy interrupted, "Will your uncle care if I stay?"

"He's dead, too." I stated and continued walking, but a hand grabbed my shoulder. Before he could ask a question, I continued, "I live there with my housekeeper. Don't worry, she will not care."

We finally arrived at the house and I opened the door, "Jack?"

"Alex? You're late. What happened?" Jack asked, concern seeping from her voice.

I looked at Percy wanting him to explain, but he just shrugged. I sighed, "Um... we were attacked by a Greek mythology monster..."

She stared at us, "Come on, Alex. You can come up with a better lie than that."

"It's not a lie, Jack." I replied with a serious look on my face.

It took her a few seconds to realize I was not joking, but she did not say anything.

I broke the silence, "Jack, this is Percy."

She shook his hand, "Pleasure. Now, would you mind filling me in on this whole 'we were attacked by a Greek mythology monster' thing?"

We told her what happened and she stared awestruck for a few minutes. Then, Percy asked me something strange. "There is a camp for demigods. Since you can see and fight the monsters, I think you should go there."

"But, I'm not a demigod." I stated.

He shrugged, "We need all the help we can get right now. Monsters are appearing over the entire world and we do not have enough demigods to fight."

"What makes you think one more is going to make a difference?" I asked.

Then, Jack spoke, "The camp can not be seen by mortals, right?" Percy nodded and Jack continued, "Alex... I think you need to go to this camp. If what Percy says is true, then..."

"Then MI6 will not be able to find me." I finished. "Do you really think I should go?"

Jack nodded, "I believe you should."

I nodded and looked at Percy, "When do we leave and how do we get from here to the States?"

~Percy~

I laughed at Alex as Blackjack and another pegasus landed in front of us. Hey, boss.

"Blackjack, how many times do I have to tell you to not call me 'boss'?"

Sorry, boss. It's a habit.

Alex was stunned for a few more moments, but then it passed. "So... This is our taxi to Camp Half-Blood?"

"Yep." I replied.

(Hours Later)

The pegasus' landed and Alex and I began to walk up a hill. I pointed at a tree, "That is Thalia's tree. Years ago, Thalia, daughter of Zeus, fought a herd of monsters to protect a few people. She died and Zeus turned her into a tree. A few summers ago, my friends and I found the Golden Fleece and hung it on the tree. Needless to say, Thalia came back to life."

"So, she's a walking tree?" The boy asked.

I laughed, "No, she's a human. A demigod, I should say." We passed the tree and walking into the camp, "This is Camp Half-Blood." Only then did I realize I had not invited Alex into the camp; I didn't need to. Chiron met us next to the basketball court.

"Ah, Percy, you're finally back." The centaur stated. "Who is that with you?"

I pointed over at Alex, "This is Alex Rider. He helped me when I was fighting a Minotaur and a hellhound. I think-" I was cut off by Chiron drawing his sword.

"Percy, get away from him now." Chiron ordered.

I was confused, "Why? Chiron what is-"

"Now!"

I slowly stepped to the side, but I had my hand gripped on Riptide. "What's going on?"

"He's John Rider's son... He is the son of a traitor!" Chiron replied.