I remembered what Ms. Castellan had said: They offered me an important job . . . It didn't work out. I wondered what kind of job left you like that.

"One minute she was all happy," I said. "And then she was freaking out about her son's fate, like she knew he'd turned into Kronos. What happened to . . . to divide her like that?"

The goddess's face darkened. "That is a story I do not like to tell. But May Castellan saw too much. If you are to understand your enemy Luke, you must understand his family."

I thought about the sad little pictures of Hermes taped above May Castellan's sink. I wondered if Ms. Castellan had been so crazy when Luke was little. That green-eyed fit could've seriously scared a nine-year-old kid. And if Hermes never visited, if he'd left Luke alone with his mom all those years . . .

"No wonder Luke ran away," I said. "I mean, it wasn't right to leave his mom like that, but still—he was just a kid. Hermes shouldn't have abandoned them."

Hestia scratched behind Mrs. O'Leary's ears. The hellhound wagged her tail and accidentally knocked over a tree.

"It's easy to judge others," Hestia warned. "But will you follow Luke's path? Seek the same powers?"

Nico set down his plate. "We have no choice, my lady. It's the only way Percy stands a chance."

"Mmm." Hestia opened her hand and the fire roared. Flames shot thirty feet into the air. Heat slapped me in the face. Then the fire died back down to normal.

"Not all powers are spectacular." Hestia looked at me. "Sometimes the hardest power to master is the power of yielding. Do you believe me?"

"Uh-huh," I said. Anything to keep her from messing with her flame powers again.

The goddess smiled. "You are a good hero, Percy Jackson. Not too proud. I like that. But you have much to learn. When Dionysus was made a god, I gave up my throne for him. It was the only way to avoid a civil war among the gods."

"It unbalanced the Council," I remembered. "Suddenly there were seven guys and five girls."

Hestia shrugged. "It was the best solution, not a perfect one. Now I tend the fire. I fade slowly into the background. No one will ever write epic poems about the deeds of Hestia. Most demigods don't even stop to talk to me. But that is no matter. I keep the peace. I yield when necessary. Can you do this?"

"I don't know what you mean."

She studied me. "Perhaps not yet. But soon. Will you continue your quest?"

"Is that why you're here—to warn me against going?"

Hestia shook her head. "I am here because when all else fails, when all the other mighty gods have gone off to war, I am all that's left. Home. Hearth. I am the last Olympian. You must remember me when you face your final decision.

I didn't like the way she said final.

I looked at Nico, then back at Hestia's warm glowing eyes. "I have to continue, my lady. I have to stop Luke . . . I mean Kronos."

Hestia nodded. "Very well. I cannot be of much assistance, beyond what I have already told you. But since you sacrificed to me, I can return you to your own hearth. I will see you again, Percy, on Olympus."

Her tone was ominous, as though our next meeting would not be happy.

The goddess waved her hand, and everything faded.

Suddenly I was home. Nico and I were sitting on the couch in my mom's apartment on the Upper East Side. That was the good news. The bad news was that the rest of the living room was occupied by Mrs. O'Leary.

I heard a muffled yell from the bedroom. Paul's voice said, "Who put this wall of fur in the doorway?"

"Percy?" my mom called out. "Are you here? Are you all right?"

"I'm here!" I shouted back.

"WOOF!" Mrs. O'Leary tried to turn in a circle to find my mom, knocking all the pictures off the walls. She's only met my mom once before (long story), but she loves her.

It took a few minutes, but we finally got things worked out. After destroying most of the furniture in the living room and probably making our neighbors really mad, we got my parents out of the bedroom and into the kitchen, where we sat around the kitchen table. Mrs. O'Leary still took up the entire living room, but she'd settled her head in the kitchen doorway so she could see us, which made her happy. My mom tossed her a ten-pound family-size tube of ground beef, which disappeared down her gullet. Paul poured lemonade for the rest of us while I explained about our visit to Connecticut.

"So it's true." Paul stared at me like he'd never seen me before. He was wearing his white bathrobe, now covered in hellhound fur, and his salt-and-pepper hair was sticking up in every direction. "All the talk about monsters, and being a demigod . . . it's really true."

I nodded. Last fall I'd explained to Paul who I was. My mom had backed me up. But until this moment, I don't think he really believed us.

"Sorry about Mrs. O'Leary," I said, "destroying the living room and all."

Paul laughed like he was delighted. "Are you kidding? This is awesome! I mean, when I saw the hoofprints on the Prius, I thought maybe. But this!"

He patted Mrs. O'Leary's snout. The living room shook—BOOM, BOOM, BOOM—which either meant a SWAT team was breaking down the door or Mrs. O'Leary was wagging her tail.

I couldn't help but smile. Paul was a pretty cool guy, even if he was my English teacher as well as my stepdad.

"Thanks for not freaking out," I said.

"Oh, I'm freaking out," he promised, his eyes wide. "I just think it's awesome!"

"Yeah, well," I said, "you may not be so excited when you hear what's happening."

I told Paul and my mom about Typhon, and the gods, and the battle that was sure to come. Then I told them Nico's plan.

My mom laced her fingers around her lemonade glass. She was wearing her old blue flannel bathrobe, and her hair was tied back. Recently she'd started writing a novel, like she'd wanted to do for years, and I could tell she'd been working on it late into the night, because the circles under her eyes were darker than usual.

Behind her at the kitchen window, silvery moon lace glowed in the flower box. I'd brought the magical plant back from Calypso's island last summer, and it bloomed like crazy under my mother's care. The scent always calmed me down, but it also made me sad because it reminded me of lost friends.

My mom took a deep breath, like she was thinking how to tell me no.

"Percy, it's dangerous," she said. "Even for you."

"Mom, I know. I could die. Nico explained that. But if we don't try—"

"We'll all die," Nico said. He hadn't touched his lemonade. "Ms. Jackson, we don't stand a chance against an invasion. And there will be an invasion."

"An invasion of New York?" Paul said. "Is that even possible? How could we not see the . . . the monsters?"

He said the word like he still couldn't believe this was real.

"I don't know," I admitted. "I don't see how Kronos could just march into Manhattan, but the Mist is strong. Typhon is trampling across the country right now, and mortals think he's a storm system."

"Ms. Jackson," Nico said, "Percy needs your blessing. The process has to start that way. I wasn't sure until we met Luke's mom, but now I'm positive. This has only been done successfully twice before. Both times, the mother had to give her blessing. She had to be willing to let her son take the risk."

"You want me to bless this?" She shook her head. "It's crazy. Percy, please—"

"Mom, I can't do it without you."

"And if you survive this . . . this process?"

"Then I go to war," I said. "Me against Kronos. And only one of us will survive."

I didn't tell her the whole prophecy—about the soul reaping and the end of my days. She didn't need to know that I was probably doomed. I could only hope I'd stop Kronos and save the rest of the world before I died.