Luke lay down on his bunk and opened the book. He wasn't sure what this was going to be like, but he knew he had to do it, no matter what pain it might cause him.

Chapter One

"I Accidentally Vaporize my Pre-Algebra Teacher,"

Luke couldn't help but smile. A title like that was such a Percy thing.

Look, I didn't want to be a half-blood.

He snorted, "Most people don't, Perce."

If you're reading this because you think you might be one, my advice is: close this book right now. Believe what ever lie your mom or dad told you about your birth, and try to lead a normal life.

Oh, how Luke wished he was in a situation were he could do that.

Being a half-blood is dangerous. It's scary. Most of the time, it gets you killed in painful, nasty ways.

"Pretty much" Luke said, sighing.

If you're a normal kid, reading this because you think it's fiction, great. Read on. I envy you for being able to believe that none of this ever happened.

But if you recognize yourself in these pages—if you feel something stirring inside—stop reading immediately. You might be one of us. And once you know that, it's only a matter of time before they sense it too, and they'll come for you.

Luke made a face.

Don't say I didn't warn you.

My name is Percy Jackson.

Luke closed his eyes, wishing it was some other kid's story, so that he didn't have to hear Percy's thoughts. It was just so hard!

I'm twelve years old. Until a few months ago, I was a boarding student at Yancy Academy, a private school for troubled kids in upstate New York.

Am I a troubled kid?

Yeah. You could say that.

Luke couldn't help but smile. Percy put it so simply.

I could start at any point in my short miserable life to prove it, but things really started going bad last May, when our sixth-grade class took a field trip to Manhattan— twenty-eight mental-case kids and two teachers on a yellow school bus, heading to the Metropolitan Museum of Art to look at ancient Greek and Roman stuff.

I know—it sounds like torture.

Luke laughed out loud.

Most Yancy field trips were.

Another laugh.

But Mr. Brunner, our Latin teacher, was leading this trip, so I had hopes.

Mr. Brunner was this middle-aged guy in a motorized wheelchair. He had thinning hair and a scruffy beard and a frayed tweed jacket, which always smelled like coffee. You wouldn't think he'd be cool, but he told stories and jokes and let us play games in class. He also had this awesome collection of Roman armor and weapons, so he was the only teacher whose class didn't put me to sleep.

Luke sighed again. He missed Chiron.

I hoped the trip would be okay. At least, I hoped that for once I wouldn't get in trouble.

Boy, was I wrong.

A slight snicker was drawn from the son of Hermes' lips.

See, bad things happen to me on field trips. Like at my fifth-grade school, when we went to the Saratoga battlefield, I had this accident with a Revolutionary War cannon. I wasn't aiming for the school bus, but of course I got expelled anyway.

Luke laughed at this to.

And before that, at my fourth-grade school, when we took a behind-the-scenes tour of the Marine World shark pool, I sort of hit the wrong lever on the catwalk and our class took an unplanned swim. And the time before that... Well, you get the idea.

By now, Luke was doubled over laughing, though it was a bitter laughter. Gods, he missed Percy!

This trip, I was determined to be good.

All the way into the city, I put up with Nancy Bobofit, the freckly, redheaded kleptomaniac girl, hitting my best friend Grover in the back of the head with chunks of peanut butter-and-ketchup sandwich.

Luke growled.

Grover was an easy target. He was scrawny. He cried when he got frustrated. He must've been held back several grades, because he was the only sixth grader with acne and the start of a wispy beard on his chin. On top of all that, he was crippled.

He had a note excusing him from PE for the rest of his life because he had some kind of muscular disease in his legs. He walked funny, like every step hurt him, but don't let that fool you. You should've seen him run when it was enchilada day in the cafeteria.

Luke sighed again at the thought of his Satyr friend. He guessed he was going to be doing a lot of sighing throughout this book.

Anyway, Nancy Bobofit was throwing wads of sandwich that stuck in his curly brown hair, and she knew I couldn't do anything back to her because I was already on probation. The headmaster had threatened me with death by in-school suspension if anything bad, embarrassing, or even mildly entertaining happened on this trip.

Luke rolled his eyes. Teachers.

"I'm going to kill her," I mumbled.

"Do it." he muttered. He really didn't like people picking on Grover.

Grover tried to calm me down. "It's okay. I like peanut butter."

He dodged another piece of Nancy's lunch.

"That's it." I started to get up, but Grover pulled me back to my seat.

"Grover," he complained, "Let him beat the brat up!" Mentally he wondered if it was a bad thing that he was sitting alone, in a closed off room, talking to a book.

"You're already on probation," he reminded me. "You know who'll get blamed if anything happens."

Looking back on it, I wish I'd decked Nancy Bobofit right then and there.

Luke sighed. He washed Percy had too. Then the kid might not have gotten involved in all this.

In-school suspension would've been nothing compared to the mess I was about to get myself into.

"You got that right, Perce."

Mr. Brunner led the museum tour.

He rode up front in his wheelchair, guiding us through the big echoey galleries, past marble statues and glass cases full of really old black-and-orange pottery.

It blew my mind that this stuff had survived for two thousand, three thousand years.

Luke muttered, "That stuff is older than that Percy. Don't you listen to Annabeth?"

He gathered us around a thirteen-foot-tall stone column with a big sphinx on the top, and started telling us how it was a grave marker, a stele, for a girl about our age. He told us about the carvings on the sides. I was trying to listen to what he had to say, because it was kind of interesting, but everybody around me was talking, and every time I told them to shut up, the other teacher chaperone, Mrs. Dodds, would give me the evil eye.

Luke narrowed his eyes. Mrs. Dodds…..Wasn't that Alecto?

Mrs. Dodds was this little math teacher from Georgia who always wore a black leather jacket, even though she was fifty years old. She looked mean enough to ride a Harley right into your locker.

Luke smiled –he would have laughed if he wasn't so worried for Percy, despite the fact that he knew what happened- at Percy's description. There was really no one with a mind quite like Percy's.

She had come to Yancy halfway through the year, when our last math teacher had a nervous breakdown.

Luke couldn't help but raise an eyebrow.

From her first day, Mrs. Dodds loved Nancy Bobofit and figured I was devil spawn. She would point her crooked finger at me and say, "Now, honey," real sweet, and I knew I was going to get after-school detention for a month.

One time, after she'd made me erase answers out of old math workbooks until midnight, I told Grover I didn't think Mrs. Dodds was human. He looked at me, real serious, and said, "You're absolutely right."

Luke rolled his eyes. "Really Grover? You blow your cover that easily?"

Mr. Brunner kept talking about Greek funeral art.

Finally, Nancy Bobofit snickered something about the naked guy on the stele, and I turned around and said, "Will you shut up?"

"Go Percy!"

It came out louder than I meant it to.

"Ha!" Luke really loved how funny Percy could be without meaning to.

The whole group laughed. Mr. Brunner stopped his story.

"Mr. Jackson," he said, "did you have a comment?"

My face was totally red. I said, "No, sir."

"That's right, Perce. Show Chiron respect." Luke sighed. "He isn't getting any from me anymore. Show him some for the both of us."

Mr. Brunner pointed to one of the pictures on the stele. "Perhaps you'll tell us what this picture represents?

I looked at the carving, and felt a flush of relief, because I actually recognized it. "That's Kronos eating his kids, right?"

"Atta boy, Perce."

"Yes," Mr. Brunner said, obviously not satisfied.

"Of course not."

"And he did this because ..."

"Well..." I racked my brain to remember. "Kronos was the king god,

Luke rolled his eyes. Percy was so naive back then!

and—"

"God?" Mr. Brunner asked.

"Titan," I corrected myself. "And ... he didn't trust his kids, who were the gods. So, um, Kronos ate them, right? But his wife hid baby Zeus, and gave Kronos a rock to eat instead.

And later, when Zeus grew up, he tricked his dad, Kronos, into barfing up his brothers and sisters—"

"Eeew!" said one of the girls behind me.

Luke made a face, "Shut up girly! It's because of that your not living through hell right now!"

"—and so there was this big fight between the gods and the Titans," I continued, "and the gods won."

Some snickers from the group.

Behind me, Nancy Bobofit mumbled to a friend, "Like we're going to use this in real life. Like it's going to say on our job applications, 'Please explain why Kronos ate his kids.' "

Luke really did not like this girl.

"And why, Mr. Jackson," Brunner said, "to paraphrase Miss Bobofit's excellent question, does this matter in real life?"

"Busted!"

"Busted," Grover muttered.

"Go Grover!" laughed Luke, though it was still kind of bitter.

"Shut up," Nancy hissed, her face even brighter red than her hair.

At least Nancy got packed, too. Mr. Brunner was the only one who ever caught her saying anything wrong. He had radar ears.

"Most centaurs do, Perce."

I thought about his question, and shrugged. "I don't know, sir."

"I see." Mr. Brunner looked disappointed. "Well, half credit, Mr. Jackson. Zeus did indeed feed Kronos a mixture of mustard and wine, which made him disgorge his other five children, who, of course, being immortal gods, had been living and growing up completely undigested in the Titan's stomach. The gods defeated their father, sliced him to pieces with his own scythe, and scattered his remains in Tartarus, the darkest part of the Underworld. On that happy note, it's time for lunch. Mrs. Dodds, would you lead us back outside?"

Luke threw his head back and laughed. Oh Chiron. His former teacher was truly one of a kind.

The class drifted off, the girls holding their stomachs, the guys pushing each other around and acting like doofuses.

Grover and I were about to follow when Mr. Brunner said, "Mr. Jackson."

I knew that was coming.

I told Grover to keep going. Then I turned toward Mr. Brunner. "Sir?"

Mr. Brunner had this look that wouldn't let you go— intense brown eyes that could've been a thousand years old and had seen everything.

"You must learn the answer to my question," Mr. Brunner told me.

"About the Titans?"

"About real life. And how your studies apply to it."

"Oh."

"What you learn from me," he said, "is vitally important. I expect you to treat it as such. I will accept only the best from you, Percy Jackson."

"That isn't really fare to Percy, Chiron. He doesn't understand what is going on." Luke said.

I wanted to get angry, this guy pushed me so hard.

"See what I mean?" Luke decided not to think about the fact that he was still talking to a book.

I mean, sure, it was kind of cool on tournament days, when he dressed up in a suit of Roman armor and shouted: "What ho!'" and challenged us, sword-point against chalk, to run to the board and name every Greek and Roman person who had ever lived, and their mother, and what god they worshipped.

Luke smiled enviously. That did sound like fun.

But Mr. Brunner expected me to be as good as everybody else, despite the fact that I have dyslexia and attention deficit disorder and I had never made above a C- in my life. No—he didn't expect me to be as good; he expected me to be better. And I just couldn't learn all those names and facts, much less spell them correctly.

Luke could sympathize. It was nearly impossible for a demigod to do good in school.

I mumbled something about trying harder, while Mr. Brunner took one long sad look at the stele, like he'd been at this girl's funeral.

"Chances are he was, Perce" muttered Luke.

He told me to go outside and eat my lunch.

The class gathered on the front steps of the museum, where we could watch the foot traffic along Fifth Avenue.

Overhead, a huge storm was brewing, with clouds blacker than I'd ever seen over the city. I figured maybe it was global warming or something, because the weather all across New York State had been weird since Christmas.

Luke sighed. That was his fault.

We'd had massive snow storms, flooding, wildfires from lightning strikes. I wouldn't have been surprised if this was a hurricane blowing in.

Nobody else seemed to notice. Some of the guys were pelting pigeons with Lunchables crackers. Nancy Bobofit was trying to pickpocket something from a lady's purse, and, of course, Mrs. Dodds wasn't seeing a thing.

Luke scoffed. There were a few choice words he wanted to use to describe this girl, but he didn't have the energy.

Grover and I sat on the edge of the fountain, away from the others. We thought that maybe if we did that, everybody wouldn't know we were from that school—the school for loser freaks who couldn't make it elsewhere.

Luke smiled slightly.

"Detention?" Grover asked.

"Nah," I said. "Not from Brunner. I just wish he'd lay off me sometimes. I mean—I'm not a genius."

Grover didn't say anything for a while. Then, when I thought he was going to give me some deep philosophical comment to make me feel better, he said, "Can I have your apple?"

Luke laughed.

I didn't have much of an appetite, so I let him take it.

I watched the stream of cabs going down Fifth Avenue, and thought about my mom's apartment, only a little ways uptown from where we sat. I hadn't seen her since Christmas. I wanted so bad to jump in a taxi and head home. She'd hug me and be glad to see me, but she'd be disappointed, too. She'd send me right back to Yancy, remind me that I had to try harder, even if this was my sixth school in six years and I was probably going to be kicked out again. I wouldn't be able to stand that sad look she'd give me.

Luke smiled at Percy's description, but it hurt. He missed his mother.

Mr. Brunner parked his wheelchair at the base of the handicapped ramp. He ate celery while he read a paperback novel. A red umbrella stuck up from the back of his chair, making it look like a motorized cafe table.

I was about to unwrap my sandwich when Nancy Bobofit appeared in front of me with her ugly friends—I guess she'd gotten tired of stealing from the tourists—and dumped her half-eaten lunch in Grover's lap.

Luke growled slightly.

"Oops." She grinned at me with her crooked teeth. Her freckles were orange, as if somebody had spray-painted her face with liquid Cheetos.

Luke made a gagging sound. He frowned. Okay, now he was acting like a girl. He needed major help!

I tried to stay cool. The school counselor had told me a million times, "Count to ten, get control of your temper." But I was so mad my mind went blank. A wave roared in my ears.

Luke smiled fondly. A wave, eh? Such a daddy's boy.

I don't remember touching her, but the next thing I knew, Nancy was sitting on her butt in the fountain, screaming, "Percy pushed me!"

Mrs. Dodds materialized next to us.

Some of the kids were whispering: "Did you see—"

"—the water—"

"—like it grabbed her—"

I didn't know what they were talking about. All I knew was that I was in trouble again.

"That. Sucks."

As soon as Mrs. Dodds was sure poor little Nancy was okay, promising to get her a new shirt at the museum gift shop, etc., etc., Mrs. Dodds turned on me. There was a triumphant fire in her eyes, as if I'd done something she'd been waiting for all semester. "Now, honey—"

"I know," I grumbled. "A month erasing workbooks."

Luke rolled his eyes. "Percy! You don't guess your punishment! That'll just make it worse!"

That wasn't the right thing to say.

"Obviously!"

"Come with me," Mrs. Dodds said.

"Wait!" Grover yelped. "It was me. I pushed her."

"Aww, Grover." sighed Luke. Despite what most people thought, Grover really was very brave. The bravest satyr Luke knew.

I stared at him, stunned. I couldn't believe he was trying to cover for me. Mrs. Dodds scared Grover to death.

She glared at him so hard his whiskery chin trembled.

"I don't think so, Mr. Underwood," she said.

"But—"

"You—willstay—here."

"Don't – threaten – Grover."

Grover looked at me desperately.

"It's okay, man," I told him. "Thanks for trying."

"Honey," Mrs. Dodds barked at me. "Now."

Nancy Bobofit smirked.

Luke called her a name that wasn't exactly flattering.

I gave her my deluxe I'll-kill-you-later stare.

Luke laughed. "Terrifying, I'm sure!"

Then I turned to face Mrs. Dodds, but she wasn't there. She was standing at the museum entrance, way at the top of the steps, gesturing impatiently at me to come on.

How'd she get there so fast?

I have moments like that a lot, when my brain falls asleep or something, and the next thing I know I've missed something, as if a puzzle piece fell out of the universe and left me staring at the blank place behind it. The school counselor told me this was part of the ADHD, my brain misinterpreting things.

Luke snorted, "As if."

I wasn't so sure.

I went after Mrs. Dodds.

Luke cringed.

Halfway up the steps, I glanced back at Grover. He was looking pale, cutting his eyes between me and Mr. Brunner, like he wanted Mr. Brunner to notice what was going on, but Mr. Brunner was absorbed in his novel.

"Chiron!" yelled Luke in horror.

I looked back up. Mrs. Dodds had disappeared again. She was now inside the building, at the end of the entrance hall.

Okay, I thought. She's going to make me buy a new shirt for Nancy at the gift shop.

"You wish."

But apparently that wasn't the plan.

I followed her deeper into the museum. When I finally caught up to her, we were back in the Greek and Roman section.

Except for us, the gallery was empty.

"Not good. Not good." muttered Luke.

Mrs. Dodds stood with her arms crossed in front of a big marble frieze of the Greek gods. She was making this weird noise in her throat, like growling.

Luke shuddered.

Even without the noise, I would've been nervous. It's weird being alone with a teacher, especially Mrs. Dodds. Something about the way she looked at the frieze, as if she wanted to pulverize it...

Luke was now shuddering so hard his body seemed to be shaking. He knew Percy was alright, but still.

"You've been giving us problems, honey," she said.

I did the safe thing. I said, "Yes, ma'am."

She tugged on the cuffs of her leather jacket. "Did you really think you would get away with it?"

The look in her eyes was beyond mad. It was evil.

The scarred nineteen year old clenched his teeth.

She's a teacher, I thought nervously. It's not like she's going to hurt me.

"Ha. If only."

I said, "I'll—I'll try harder, ma'am."

Thunder shook the building.

"Zeus."

"We are not fools, Percy Jackson," Mrs. Dodds said. "It was only a matter of time before we found you out. Confess, and you will suffer less pain."

I didn't know what she was talking about.

All I could think of was that the teachers must've found the illegal stash of candy I'd been selling out of my dorm room.

"Oh yeah -Wait, selling candy out of your dorm room?" said Luke in shock. Who knew Percy had it in him.

Or maybe they'd realized I got my essay on Tom Sawyer from the Internet without ever reading the book and now they were going to take away my grade. Or worse, they were going to make me read the book.

"Uh-huh. That's the reason, Perce."

"Well?" she demanded.

"Ma'am, I don't..."

"Your time is up," she hissed.

Then the weirdest thing happened. Her eyes began to glow like barbecue coals. Her fingers stretched, turning into talons. Her jacket melted into large, leathery wings. She wasn't human. She was a shriveled hag with bat wings and claws and a mouth full of yellow fangs, and she was about to slice me to ribbons.

Luke whimpered. Actually whimpered. Whimpering is not a Luke type of thing to do, unless of course he is dealing with Kronos. Then every normal response is thrown out the window.

Then things got even stranger.

Mr. Brunner, who'd been out in front of the museum a minute before, wheeled his chair into the doorway of the gallery, holding a pen in his hand.

"What ho, Percy!" he shouted, and tossed the pen through the air.

Mrs. Dodds lunged at me.

The son of Hermes forgot to breathe.

With a yelp, I dodged and felt talons slash the air next to my ear. I snatched the ballpoint pen out of the air, but when it hit my hand, it wasn't a pen anymore. It was a sword—Mr. Brunner's bronze sword, which he always used on tournament day.

His eyes flew across the page, desperate to read more.

Mrs. Dodds spun toward me with a murderous look in her eyes.

My knees were jelly. My hands were shaking so bad I almost dropped the sword.

She snarled, "Die, honey!"

And she flew straight at me.

Absolute terror ran through my body. I did the only thing that came naturally: I swung the sword.

The metal blade hit her shoulder and passed clean through her body as if she were made of water. Hisss!

Luke sighed in relief and began to breathe again. It was a good thing to; he had started to turn blue.

Mrs. Dodds was a sand castle in a power fan. She exploded into yellow powder, vaporized on the spot, leaving nothing but the smell of sulfur and a dying screech and a chill of evil in the air, as if those two glowing red eyes were still watching me.

I was alone.

There was a ballpoint pen in my hand.

Mr. Brunner wasn't there. Nobody was there but me.

My hands were still trembling. My lunch must've been contaminated with magic mushrooms or something.

Luke laughed hysterically. He would have laughed anyway, but right know his nerves were so fried that it came out sounding kind of crazy.

Had I imagined the whole thing?

I went back outside.

It had started to rain.

Grover was sitting by the fountain, a museum map tented over his head. Nancy Bobofit was still standing there, soaked from her swim in the fountain, grumbling to her ugly friends. When she saw me, she said, "I hope Mrs. Kerr whipped your butt."

"Who?"

I said, "Who?"

He chuckled.

"Our teacher. Duh!"

I blinked. We had no teacher named Mrs. Kerr. I asked Nancy what she was talking about.

She just rolled her eyes and turned away.

I asked Grover where Mrs. Dodds was.

He said, "Who?"

Luke groaned. That was just going to freak Percy out even more.

But he paused first, and he wouldn't look at me, so I thought he was messing with me.

"He really needs to learn to lie." muttered Luke.

"Not funny, man," I told him. "This is serious."

Thunder boomed overhead.

I saw Mr. Brunner sitting under his red umbrella, reading his book, as if he'd never moved.

I went over to him.

He looked up, a little distracted. "Ah, that would be my pen. Please bring your own writing utensil in the future, Mr. Jackson."

Luke laughed, "Oh, Chiron."

I handed Mr. Brunner his pen. I hadn't even realized I was still holding it.

"Sir," I said, "where's Mrs. Dodds?"

He stared at me blankly. "Who?"

"The other chaperone. Mrs. Dodds. The pre-algebra teacher."

He frowned and sat forward, looking mildly concerned. "Percy, there is no Mrs. Dodds on this trip. As far as I know, there has never been a Mrs. Dodds at Yancy Academy. Are you feeling all right?"

Luke set the book down and flopped onto the bunk. He hopped all of the chapters weren't going to be this nerve-wracking.