A/N (I recommend reading this): I'm going to MAKE THIS CLEAR. Just like I mention on my bio page about every other fanfiction I done: I DON'T OWN THE PERCY JACKSON AND THE OLYMPIAN SERIES OR IT'S CHARACTERS as the rights goes to Rick Rioran. Also I suggest you guys start paying attention to the Author notes and my warnings that I left on EVERY chapter of EVERY story.

Sorry if this chapter is too much like the book.

Due to the limited number of characters posted, I'm forced to post only the names of the characters telling their tales in this story. When I get to the House of Hades and Blood of Olympus, I'll list off the first four characters listed in the order they tell their tales. I'll post the pairings if the two of the four characters listed are a pair. Other than that, the Pairings stay the same for this story.

Jason x Piper
Percy x Annabeth
Frank x Hazel

If you haven't figured it out, each of the members of the Prophecy of Seven practically has a position. Keep in mind in the original series Juno started this when she told Percy he was the glue that holds the group together, so I thought to give the rest a title. But no matter what title they have they still depend on each other. Titles will be added for some as the series continue

Jason: Leader of the Group

Piper: Peacekeeper

Leo: Mechanic and Seventh Wheel (by Nemesis)

Percy: Glue that holds everyone together

Hazel: Youngest (Literally and figuratively as the title refers to the fact that even though she has proven herself as one of the seven, Hazel still has much to learn compared to the rest about what she is capable to do that can help the group. Keep in mind Hazel has not master shadow travel or Mist Manipulation yet).

Frank: Muscles

Annabeth: Battle Strategist and Consultant

Warning: Certain ancient Greeknames matches words use of foul language but no foul language was intentionally used. Also I dropped the '& the Olympians' in 'The Tales of the Son of Poseidon & the Olympians' as well as replaced the '&' with ':' in the short stories of that part of the series. So if you haven't read them yet read 'The Tales of the Son of Poseidon: the Early Adventures' 'The Tales of the Son of Poseidon: The Lightning Thief' 'The Tales of the Son of Poseidon: The Sea of Monsters' 'The Tales of the Son of Poseidon: The Titan's Curse' 'The Tales of the Son of Poseidon: The Magical Labyrinth' 'The Tales of the Son of Poseidon: the Stolen Chariot' 'The Tales of the Son of Poseidon: the Sword of Hades', 'The Tales of the Son of Poseidon: the Bronze Dragon' 'The Tales of the Son of Poseidon: The Last Olympian' 'The Tales of the Son of Poseidon: the Staff of Hermes' 'The Tales of the Heroes of Olympus: The Lost Hero' 'The Tales of the Heroes of Olympus: The Quest for Buford' and 'The Tales of the Heroes of Olympus: The Son of Neptune' before reading this story as stuff that happened in them will be mentioned. Lastly, any one who wants to do a Demigods and Olympian reads story using 'The Tales of the Son of Poseidon' is allowed as long as you inform me about it.

Leo's POV Part X

One problem solved: the hatch above closed automatically, cutting off our pursuers. It also cut off all light, but Frank and I could deal with that. I just hoped we didn't need to get out the same way we came in. I wasn't sure I could open the tile from underneath. It helped that the tunnel was wider than the entrance so that even Frank could fit down here in human form.

At least the possessed American dudes were on the other side. Over my head the marble floor shuddered, like fat tourist feet were kicking it.

Frank must have turned back into human form, because I could hear him wheezing in the dark.

"What now?" Frank asked.

"Okay, don't freak," I said. "I'm going to summon a little fire, just so we can see."

"Thanks for the warning."

My index finger blazed like a birthday candle. In front of us stretched a stone tunnel with a low ceiling. Just as Hazel had predicted, it slanted down, the level out and went south.

"Well," Leo said. "It only goes in one direction."

"Let's find Hazel," Frank said.

I'm not going to argue about that suggestion, or the fact that Frank let me take the lead so if my flames grew or if the rest of me catch on fire he can back away. Other than the reason why, I was actually glad to have Frank watching my back. He's big and strong and able to turn into scary animals in case those possessed tourist somehow broke through the hatch, squeezed inside, and follow us. I wondered if the eidolons might just leave those bodies behind and find someone else who probably could break through that tunnel.

Oh, there's my happy thought for the day! Leo scolded himself.

After a hundred feet or so, we turned a corner and found Hazel. The light of her golden cavalry sword, she was examining a door. She was so engrossed, she didn't noticed us. I was tempted to go, "BOO!" but I decided to go with something more formal, "Hi."

It seemed either choice would have got me killed under normal circumstances, as Hazel whirled, trying to swing her Spatha which was blocked off by the corridor.

"What are you doing here?" Hazel demanded.

I gulped. "Sorry. We ran into angry tourist."

"What?"

Frank and I explained about the Eidolons up above.

Hazel hissed in frustration. "I hate eidolons. I thought Piper made them promise to stay away."

"Oh…" Frank said, like he'd just had his own daily thought. "Piper made them promise to stay off the ship and not possess any of us. But if they followed us, and used other bodies to attack us, they're not technical breaking their vows…"

"Great," I muttered. "Eidolons who are also lawyers. Now I really want to kill them."

"Okay, forget them for now," Hazel said. "This door is giving me fits. Leo, can you tryi our skills with the lock?"

I cracked my knuckleds. "Stand aside for the master, please."

The door was interesting, much more complicated than the Roman numeral combination lock above. The entire door was coated in Imperial gold. A mechanical sphere about the size of a bowling ball was embedded in the center. The sphere was constructed from five concentric rings, each inscribed with zodiac symbols—the bull, the scorpion, et cetera—and seemingly random number and letters. Something about this design seem familiar—something my siblings told me in Camp-Half-Blood.

"These letters are Greek," I said in surprise.

"Well, lots of Romans spoke Greek," Hazel said.

"I guess," I said. "But this workmanship… no offense to you Camp Jupiter types, but this is too complicated to be Roman."

Frank snorted. "Whereas you Greeks just love making things complicated."

Okay, maybe I should of used m words wiser. But at the time I was too much impress with the workmanship of this lock. But I wasn't about to let Frank when this argument.

"Hey," I protested. "All I'm saying is this machinery is delicate, sophisticated. It reminds me of…" That's when it dawn to me who might of created this sphere. I stared at it in amazement. "It's a more advance sort of lock." I decided. "It uses astronomy and geometry and a bunch of other stuff to align the symbols on the different rings in the right order, and that opens the door."

"But what's the right order?" Hazel asked.

"If I'm right about who made this, it should be the value of Pi," I replied.

Frank frowned. "What kind of pie?"

"He means the number," Hazel guessed. "I learned that in math class once, but—"

"It's used to measure circles," I said. "I'm pretty sure pi is, uh, 3.1415 blah blah blah. The number goes on forever, but the sphere only has five rings, so that should be enough, if I'm right."

"And if you're not?" Frank asked.

"Well, then, I fall down, go boom. Let's find out."

I was about to start from the outside in when I remember that pi is an infinite number so it would be best to work from the inside out. I turned the rings, lining up the right numbers until they made the right value of pi. When I aligned the last ring, something inside the sphere clicked. The door swung open.

I beamed at my friends. "That, good people, is how we do things in Leo World. Come on in!"

"I hate Leo World," Frank muttered.

Hazel laughed.

Inside was enough cool stuff to keep me busy for years. The room was about the size of the forge back at Camp Half-Blood, with bronze-topped worktables along the walls, and baskets full of ancient metalworking tool. Dozens of bronze and gold spheres like steampunk basketballs sat around in various stages of disassembly. Loose gear and wiring littered the floor. Thick metal cables ran from each table toward the back of the room, where there was an enclosed loft like a theater' sound booth. Stair led up to the booth on either side. All the cables seemed to run into it. Next to the stairs on the left, a row of cubbyholes was filled with leather cylinders—probably ancient scroll cases.

I was about to head to the tables when I glanced to my left and my brain switch to techno geek mode. Flanking the doorway were two armored manikins—like skeletal scarecrows made from bronze pipes, outfitted with full suits of Roman armor, shield and sword.

"Dude!" I walked up to one. "These would be awesome if they worked."

Frank edged away from the manikins. "Those things are going to come alive and attacked us, aren't they?"

I laughed. "Not a chance. They aren't complete." I taped the nearest manikin's neck, where loose copper wires sprouted from underneath its breastplate. "Look, the head's wiring has been disconnected. And here, at the elbow, the pulley system for this joint I out of alignment. My guess? The Romans were trying to duplicate a Greek design without the original blueprint and couldn't do such a complicated design cause of it."

Hazel arched her eyebrows. "The Romans weren't good enough at being complicated, I supposed."

"Or delicate," Frank added. "Or sophisticated."

"Pretty impressive try," I said ignoring them, "Children of Vulcan must have attempted this after Archimedes' death. I've heard legends that the Romans confiscated his writings, but—"

"Archimedes?" Hazel looked baffled. "Wasn't he an ancient mathematician or something?"

I laughed. "He was a lot more that. He was the most famous son of Hephaestus who ever lived."

Frank scratch his ear. "I've heard his name before, but how can you be sure this manikin is his design? According to Percy and Annabeth Daedalus was a great inventor—so it might be his designs."

"True, Daedalus was, but I recognize a work of a child of Hephaestus, and these designs are definitely the work of one," I explained. "Plus it explains the lock of the safe. Archimedes after all was the one who discovered pi."

"I guess that makes sense," Hazel said.

"Look, I've read all about Archimedes. He's a hero to Cabin Nine. The dude was Greek, right? He lived in one of the Greek colonies in southern Italy, back before Rome got all huge and took over. Finally the Romans moved in and destroyed his city. The Roman General wanted to spare Archimedes, because he was so valuable."

"That might also be why the Romans let your ancestors join the legion, Frank," Hazel said. "They probably thought your ancestors were valuable enough with your family gift to help them build their empire."

"If they did, then Frank's ancestors must have been more fortunate than Archimedes," Leo added. "Archimedes was a head of his time, but most of the General's men didn't agree with their commander and killed Archimedes."

Frank grunted as if being grateful his ancestors were more fortunate than Archimedes. "How do you know all this, anyway?" He asked. "Is there a Spanish tour guide around here?"

"No, man," I replied. "How do I put it—you can't be a demigod who's into building stuff and not know about Archimedes. It would be like being a demigod who is into architect without hearing about Daedalus and his Labyrinth—almost unheard of."

"I guess that makes sense," Hazel said.

"Anyway, Archimedes invented cool stuff like the hydraulic screw that could move water through pipes, and a death ray made of mirrors that could burn enemy ship, and a massive claw that could swing on a crane and pluck enemy hips out the water," Leo said. "Modern mortal have tried to duplicate some of his inventions, they were only able to successfully built not even half of his designs—mostly because Mortals never understand how Archimedes use Celestial bronze for his weapons. That's the key to his inventions."

"So if Archimedes was killed and his city was destroyed, how did this stuff end up bellow the Pantheon?" Hazel asked.

"Well, the legend goes, the Roman General was such a big fan of Archimedes' work, he raided his workshop and carted a bunch of souvenirs back to Rome. After that, most of the designs disappeared from history, except…" I waved my hands at the stuff on the tables. "Here they are."

"Metal basketballs?" Hazel asked.

I couldn't believe what I just heard, but I tried to contain my irritation. "Guy, Archimedes constructed spheres. The Romans couldn't figure them out because—as I said before—Archimedes was way ahead of his time. The Romans couldn't figure them out. They thought they were just for telling time or following constellations, because they covered with pictures of stars and planets. But that's like finding a rifle and thinking it's a walking stick."

"Leo, the Romans were top-notch engineers," Hazel reminded me, "They built aqueducts, roads—"

"Siege weapons," Frank added. "Public sanitation."

"Yeah, fine," I said. "The Romans built great things themselves. But even you have to admit the Romans wasn't able to duplicate all of the Greek's works. Archimedes' spheres could do all sorts of things, only nobody is sure…"

Suddenly I got an idea so incredible that my nose burst into flames. I patted it out so quickly as possible. It always been embarrassing whenever that happened.

I ran to the row of cubbyholes and examined the marking on the scroll cases. "Oh, gods. This is it."

I gingerly lifted out one of the scrolls. I wasn't great at Ancient Greek, but I could tell the inscription on the case read On Building Spheres.

"Guys, this is the lost book!" My hands were shaking. "Archimedes wrote this, describing his construction methods, but all the copies were lost in ancient times. If I can translate this…"

The possibilities were endless. For me, the quest had now totally taken on a new dimension. I had to get the spheres and scrolls safely out of here. I had to protect this stuff until I could get back to Bunker Nine.

"Frank, I'm going to need to use your backpack!" I said.

"What?" Frank asked.

"Worry, just going to transfer the stuff I have into your bag," I said. "I'm not going to leave without the sphere or scroll. If I could master at least one of them, it could get us an advantage over Gaea—heck! It might save both of our camps from upcoming attack."

Hazel and Frank glanced each other skeptically.

"Okay," Hazel said. "We didn't come here for a scroll, but if you think it will help us with the quest—I guess I don't see any problem bringing both it and a sphere."

"Fine!" Frank handed me his backpack.

I dumped my supplies into it, before taking a sphere and placing it in my backpack carefully along with the scroll. For the first time in days, I felt really hopeful.

Of course, just when I thought that, everything went wrong.

On the table next to Hazel, one of the orbs that I didn't grabbed clicked and whirred. A row of spindly legs extended from its equator. The orb stood and two bronze cables shot out of the top, hitting Hazel and Frank like Taser wires. Both of my friends crumpled to the floor.

I lunged to help them, but the two armored manikins that couldn't possibly move did move. They drew their swords and stepped toward me.

One on the left turned its crooked helmet, which was shaped like a wolf's head. Despite the fact that it had no face or mouth, a familiar hollow voice spoke from behind its visor.

"You cannot escape us, Leo Valdez," it said. "We do not like possessing machines, but they are better than tourist. You will not leave here alive."