THEY COULD SEE THE WHITE FLAG from half a mile away. It was as big as a soccer field, carried by a thirty-foot-tall giant with bright blue skin and icy gray hair.

"A Hyperborean," Thalia said. "The giants of the north. It's a bad sign that they sided with Kronos. They're usually peaceful."

"You've met them?" Percy asked.

"Mmm. There's a big colony in Alberta. You do not want to get into a snowball fight with those guys."

As the giant got closer, Selena could see three human-size envoys with him: a half-blood in armor, an empousa demon with a black dress and flaming hair, and a tall man in a tuxedo. The empousa held the tux dude's arm, so they looked like a couple on their way to a Broadway show or something, you know, except for her flaming hair and fangs.

The group walked leisurely toward the Heckscher Playground. The swings and ball courts were empty. The only sound was the fountain on Umpire Rock.

Percy looked at Grover. "The tux dude is the Titan?"

He nodded nervously. "He looks like a magician. I hate magicians. They usually have rabbits."

Percy stared at him. "You're scared of bunnies?"

"Blah-hah-hah! They're big bullies. Always stealing celery from defenceless satyrs!"

Thalia coughed.

"What?" Grover demanded.

"We'll have to work on your bunny phobia later," Selena smirked. "Here they come."

The man in the tux stepped forward. He was taller than an average human—about seven feet. His black hair was tied in a ponytail. Dark round glasses covered his eyes, but what really caught Selena's attention was the skin on his face. It was covered in scratches, like he'd been attacked by a small animal—a really, really mad hamster, maybe.

"Percy Jackson," he said in a silky voice. "It's a great honor."

His lady friend the empousa hissed at him. She'd probably heard how Percy had destroyed two of her sisters last summer.

"My dear," Tux Dude said to her. "Why don't you make yourself comfortable over there, eh?" She released his arm and drifted over to a park bench.

Selena glanced at the armed demigod behind Tux Dude. She hadn't recognized him in his new helmet, but it was her old backstabbing buddy Ethan Nakamura. His nose looked like a squashed tomato from his fight with Percy on the Williamsburg Bridge. That made Selena feel better.

"Hey, Ethan," Percy crossed his arms, "You're looking good."

Ethan glared at him and Selena smiled devilishly, "Let me guess. Karma hit you in the face?"

"Shut it, Selena."

"To business." Tux Dude extended his hand. "I am Prometheus."

Percy's eyebrows shot up, "The fire-stealer guy? The chained-to-the-rock-with-the-vultures guy?"

Prometheus winced. He touched the scratches on his face. "Please, don't mention the vultures. But yes, I stole fire from the gods and gave it to your ancestors. In return, the ever merciful Zeus had me chained to a rock and tortured for all eternity."

"But—"

"How did I get free? Hercules did that, eons ago. So you see, I have a soft spot for heroes. Some of you can be quite civilized."

"Unlike the company you keep," Selena commented, raising her eyes at Ethan, but Prometheus apparently thought she meant the empousa.

"Oh, demons aren't so bad," he said. "You just have to keep them well fed. Now, Percy Jackson, let us parley."

He waved him toward a picnic table and they sat down. Thalia, Selena, and Grover stood behind Percy.

The blue giant propped his white flag against a tree and began absently playing on the playground. He stepped on the monkey bars and crushed them, but he didn't seem angry. He just frowned and said, "Uh-oh." Then he stepped in the fountain and broke the concrete bowl in half. "Uh-oh." The water froze where his foot touched it. A bunch of stuffed animals hung from his belt—the huge kind you get for grand prizes at an arcade. He reminded Selena of Tyson, and the idea of fighting him made her sad.

Prometheus sat forward and laced his fingers. He looked earnest, kindly, and wise. "Percy, your position is weak. You know you can't stop another assault."

"We'll see."

Prometheus looked pained, like he really cared what happened to him. "Percy, I'm the Titan of forethought. I know what's going to happen." He glanced at Selena and she shifted uncomfortably.

"Also the Titan of crafty counsel," Grover put in. "Emphasis on crafty."

Prometheus shrugged. "True enough, satyr. But I supported the gods in the last war. I told Kronos: 'You don't have the strength. You'll lose.' And I was right. So you see, I know how to pick the winning side. This time, I'm backing Kronos."

"Because Zeus chained you to a rock," Percy guessed.

"Partly, yes. I won't deny I want revenge. But that's not the only reason I'm supporting Kronos. It's the wisest choice. I'm here because I thought you might listen to reason."

He drew a map on the table with his finger. Wherever he touched, golden lines appeared, glowing on the concrete. "This is Manhattan. We have armies here, here, here, and here. We know your numbers. We outnumber you twenty to one."

"Your spy has been keeping you posted," Percy guessed.

Prometheus smiled apologetically. "At any rate, our forces are growing daily. Tonight, Kronos will attack. You will be overwhelmed. You've fought bravely, but there's just no way you can hold all of Manhattan. You'll be forced to retreat to the Empire State Building. There you'll be destroyed. I have seen this. It will happen."

While he said the last part, his eyes drifted up towards Selena. Her shoulders dropped. He knew of her fate, too.

"I won't let it happen," Percy said.

Prometheus brushed a speck off his tux lapel. "Understand, Percy. You are refighting the Trojan War here. Patterns repeat themselves in history. They reappear just as monsters do. A great siege. Two armies. The only difference is, this time you are defending. You are Troy. And you know what happened to the Trojans, don't you?"

"So you're going to cram a wooden horse into the elevator at the Empire State Building?" Percy asked. "Good luck."

Prometheus smiled. "Troy was completely destroyed, Percy. You don't want that to happen here. Stand down, and New York will be spared. Your forces will be granted amnesty. I will personally assure your safety. Let Kronos take Olympus. Who cares? Typhon will destroy the gods."

"Right," Percy replied, "And I'm supposed to believe Kronos would spare the city."

"All he wants is Olympus," Prometheus promised. "The might of the gods is tied to their seats of power. You saw what happened to Poseidon once his undersea palace was attacked."

Percy winced and Selena touched his shoulder gently, trying to bring him comfort.

"Yes," Prometheus said sadly. "I know that was hard for you. When Kronos destroys Olympus, the gods will fade. They will become so weak they will be easily defeated. Kronos would rather do this while Typhon has the Olympians distracted in the west. Much easier. Fewer lives lost. But make no mistake, the best you can do is slow us down. The day after tomorrow, Typhon arrives in New York, and you will have no chance at all. The gods and Mount Olympus will still be destroyed, but it will be much messier. Much, much worse for you and your city. Either way, the Titans will rule."

Thalia pounded her fist on the table. "I serve Artemis. The Hunters will fight to our last breath. Percy, you're not seriously going to listen to this slimeball, are you?"

Selena winced. She figured Prometheus was going to blast her, but he just smiled. "Your courage does you credit, Thalia Grace."

Thalia stiffened. "That's my mother's surname. I don't use it."

"As you wish," Prometheus said casually, but Selena could tell he'd gotten under her skin, "At any rate, you need not be my enemy. I have always been a helper of mankind."

"That's a load of Minotaur dung," Thalia replied, "When mankind first sacrificed to the gods, you tricked them into giving you the best portion. You gave us fire to annoy the gods, not because you cared about us."

Prometheus shook his head. "You don't understand. I helped shape your nature."

A wiggling lump of clay appeared in his hands. He fashioned it into a little doll with legs and arms. The lump man didn't have any eyes, but it groped around the table, stumbling over Prometheus's fingers. "I have been whispering in man's ear since the beginning of your existence. I represent your curiosity, your sense of exploration, your inventiveness. Help me save you, Percy. Do this, and I will give mankind a new gift—a new revelation that will move you as far forward as fire did. You can't make that kind of advance under the gods. They would never allow it. But this could be a new golden age for you. Or . . ." He made a fist and smashed the clay man into a pancake.

The blue giant rumbled, "Uh-oh." Over at the park bench, the empousa bared her fangs in a smile.

"Percy, you know the Titans and their offspring are not all bad," Prometheus said. "You've met Calypso."

Percy's face and neck turned red, "That's different."

"How? Much like me, she did nothing wrong, and yet she was exiled forever simply because she was Atlas's daughter. We are not your enemies. Don't let the worst happen," he pleaded. "We offer you peace."

Percy looked at Ethan Nakamura. "You must hate this."

"I don't know what you mean."

"If we took this deal, you wouldn't get revenge. You wouldn't get to kill us all. Isn't that what you want?"

His good eye flared. "All I want is respect, Jackson. The gods never gave me that. You wanted me to go to your stupid camp, spend my time crammed into the Hermes cabin because I'm not important? Not even recognized?" Ethan looked to Selena, "You understand, don't you, unclaimed daughter."

"Don't compare me to you." Selena glared at Ethan, "I may not be claimed, but I'm still recognized by the gods because what I have done for them. You chose the wrong path."

"No!" Ethan stood and slammed his hands on the table, "You chose the wrong path. And you shall pay for it."

"Your mom's the goddess of revenge," Percy told Ethan, turning him away from Selena, "We should respect that?"

"Nemesis stands for balance! When people have too much good luck, she tears them down."

"Which is why she took your eye?"

"It was payment," he growled. "In exchange, she swore to me that one day I would tip the balance of power. I would bring the minor gods respect. An eye was a small price to pay."

"Great mom."

"At least she keeps her word, unlike the Olympians. She always pays her debts—good or evil."

"Yeah," Percy said. "So I saved your life, and you repaid me by raising Kronos. That's fair."

Ethan grabbed the hilt of his sword, but Prometheus stopped him.

"Now, now," the Titan said. "We're on a diplomatic mission."

Prometheus studied Percy as if trying to understand his anger. Then he nodded like he'd just picked a thought from his brain.

"It bothers you what happened to Luke," he decided. "Hestia didn't show you the full story. Perhaps if you understood . . ."

The Titan reached out.

Thalia cried a warning, but before Percy could react, Prometheus's index finger touched his forehead.