“I don’t trust your father,” I said.

“You should not,” the girl agreed. “You will have to trick him. But you cannot take the prize directly. You will die!”

I chuckled. “Then why don’t you help me, pretty one?”

“I . . . I am afraid. Ladon will stop me. My sisters, if they found out . . . they would disown me.”

“Then there’s nothing for it.” I stood up, rubbing my hands together.

“Wait!” the girl said.

She seemed to be agonizing over a decision. Then, her fingers trembling, she reached up and plucked a long white brooch from her hair. “If you must fight, take this. My mother, Pleione, gave it to me. She was a daughter of the ocean, and the ocean’s power is within it. My immortal power.”

The girl breathed on the pin and it glowed faintly. It gleamed in the starlight like polished abalone.

“Take it,” she told me. “And make of it a weapon.”

I laughed. “A hairpin? How will this slay Ladon, pretty one?”

“It may not,” she admitted. “But it is all I can offer, if you insist on being stubborn.”

The girl’s voice softened my heart. I reached down and took the hairpin, and as I did, it grew longer and heavier in my hand, until I held a familiar bronze sword.

“Well balanced,” I said. “Though I usually prefer to use my bare hands. What shall I name this blade?”

“Anaklusmos,” the girl said sadly. “The current that takes one by surprise. And before you know it, you have been swept out to sea.”

Before I could thank her, there was a trampling sound in the grass, a hiss like air escaping a tire, and the girl said, “Too late! He is here!”

I sat bolt upright in the Lamborghini’s driver’s seat. Grover was shaking my arm.

“Percy,” he said. “It’s morning. The train’s stopped. Come on!”

I tried to shake off my drowsiness. Thalia, Zoë, and Bianca had already rolled up the metal curtains. Outside were snowy mountains dotted with pine trees, the sun rising red between two peaks.

I fished my pen out of my pocket and stared at it. Anaklusmos, the Ancient Greek name for Riptide. A different form, but I was sure it was the same blade I’d seen in my dream.

And I was sure of something else, too. The girl I had seen was Zoë Nightshade.

TWELVE

I GO SNOWBOARDING WITH A PIG

We’d arrived on the outskirts of a little ski town nestled in the mountains. The sign said WELCOME TO CLOUDCROFT, NEW MEXICO. The air was cold and thin. The roofs of the cabins were heaped with snow, and dirty mounds of it were piled up on the sides of the streets. Tall pine trees loomed over the valley, casting pitch-black shadows, though the morning was sunny.

Even with my lion-skin coat, I was freezing by the time we got to Main Street, which was about half a mile from the train tracks. As we walked, I told Grover about my conversation with Apollo the night before—how he’d told me to seek out Nereus in San Francisco.

Grover looked uneasy. “That’s good, I guess. But we’ve got to get there first.”

I tried not to get too depressed about our chances. I didn’t want to send Grover into a panic, but I knew we had another huge deadline looming, aside from saving Artemis in time for her council of the gods. The General had said Annabeth would only be kept alive until the winter solstice. That was Friday, only four days away. And he’d said something about a sacrifice. I didn’t like the sound of that at all.

We stopped in the middle of town. You could pretty much see everything from there: a school, a bunch of tourist stores and cafes, some ski cabins, and a grocery store.

“Great,” Thalia said, looking around. “No bus station. No taxis. No car rental. No way out.”

“There’s a coffee shop!” said Grover.

“Yes,” Zoë said. “Coffee is good.”

“And pastries,” Grover said dreamily. “And wax paper.”

Thalia sighed. “Fine. How about you two go get us some food. Percy, Bianca, and I will check in the grocery store. Maybe they can give us directions.”

We agreed to meet back in front of the grocery store in fifteen minutes. Bianca looked a little uncomfortable coming with us, but she did.

Inside the store, we found out a few valuable things about Cloudcroft: there wasn’t enough snow for skiing, the grocery store sold rubber rats for a dollar each, and there was no easy way in or out of town unless you had your own car.

“You could call for a taxi from Alamogordo,” the clerk said doubtfully. “That’s down at the bottom of the mountains, but it would take at least an hour to get here. Cost several hundred dollars.”

The clerk looked so lonely, I bought a rubber rat. Then we headed back outside and stood on the porch.

“Wonderful,” Thalia grumped. “I’m going to walk down the street, see if anybody in the other shops has a suggestion.”

“But the clerk said—”

“I know,” she told me. “I’m checking anyway.”

I let her go. I knew how it felt to be restless. All half-bloods had attention deficit problems because of our inborn battlefield reflexes. We couldn’t stand just waiting around. Also, I had a feeling Thalia was still upset over our conversation last night about Luke.

Bianca and I stood together awkwardly. I mean . . . I was never very comfortable talking one-on-one with girls anyway, and I’d never been alone with Bianca before. I wasn’t sure what to say, especially now that she was a Hunter and everything.

“Nice rat,” she said at last.

I set it on the porch railing. Maybe it would attract more business for the store.

“So . . . how do you like being a Hunter so far?” I asked.

She pursed her lips. “You’re not still mad at me for joining, are you?”

“Nah. Long as, you know . . . you’re happy.”

“I’m not sure ‘happy’ is the right word, with Lady Artemis gone. But being a Hunter is definitely cool. I feel calmer somehow. Everything seems to have slowed down around me. I guess that’s the immortality.”

I stared at her, trying to see the difference. She did seem more confident than before, more at peace. She didn’t hide her face under a green cap anymore. She kept her hair tied back, and she looked me right in the eyes when she spoke. With a shiver, I realized that five hundred or a thousand years from now, Bianca di Angelo would look exactly the same as she did today. She might be having a conversation like this with some other half-blood long after I was dead, but Bianca would still look twelve years old.

“Nico didn’t understand my decision,” Bianca murmured. She looked at me like she wanted assurance it was okay.

“He’ll be all right,” I said. “Camp Half-Blood takes in a lot of young kids. They did that for Annabeth.”

Bianca nodded. “I hope we find her. Annabeth, I mean. She’s lucky to have a friend like you.”

“Lot of good it did her.”

“Don’t blame yourself, Percy. You risked your life to save my brother and me. I mean, that was seriously brave. If I hadn’t met you, I wouldn’t have felt okay about leaving Nico at the camp. I figured if there were people like you there, Nico would be fine. You’re a good guy.”

The compliment took me by surprise. “Even though I knocked you down in capture the flag?”

She laughed. “Okay. Except for that, you’re a good guy.”

A couple hundred yards away, Grover and Zoë came out of the coffee shop loaded down with pastry bags and drinks. I kind of didn’t want them to come back yet. It was weird, but I realized I liked talking to Bianca. She wasn’t so bad. A lot easier to hang out with than Zoë Nightshade, anyway.

“So what’s the story with you and Nico?” I asked her. “Where did you go to school before Westover?”

She frowned. “I think it was a boarding school in D.C. It seems like so long ago.”

“You never lived with your parents? I mean, your mortal parent?”