“Look where? Does anyone have any clue where we are?” Cat said.

“We’re on the moon,” Claire said.

“We need to find Solon,” Ander said. “He’ll know what to do.”

“Are we close?” Eureka asked.

“I tried to steer us toward a city called Kusadasi on the western coast of Turkey. But this doesn’t look like any of the pictures I researched. The coastline is …”

“What?” Eureka asked.

Ander looked away. “It’s different now.”

“You mean the city you were trying to get us to is underwater,” Eureka said.

“Have you even met this Solon guy?” Cat asked. She was trolling the landscape for large swaths of seaweed, bundling them under one arm.

“No,” Ander said, “but—”

“What if he sucks as bad as the rest of your horrible family?”

“He’s not like them,” Ander said. “He can’t be.”

“Not like we’ll ever know,” Cat said, “because we have no idea how to find him.”

“I think I can.” Ander ran his fingers through his hair quickly, a nervous habit.

Cat swiped rain from her cheeks and sat down with her mound of seaweed in her lap. She knotted strands of it together, until it almost resembled a blanket. For Dad. Eureka felt stupid she hadn’t thought to do the same.

“He thinks he can?” Cat muttered to her blanket.

Ander lowered his face to Cat’s. “Do you have any idea what it’s like to reject everything you’ve been raised to believe? The one true thing in my world is what I feel for Eureka.”

“If I never see my family again—” Cat said.

“That’s not going to happen.” Eureka tried to mediate. “Who’s coming with me to find help?”

Cat stared down at the seaweed. Eureka realized she was crying.

Dad’s wound was serious, but at least he was here with Eureka and the twins. Cat didn’t even know where her father was. Eureka’s tears had dissolved Cat’s family. She had no idea what had become of any of them. All she had was Eureka.

“Cat—” Eureka reached for her friend.

“Do you know what the last thing I told Barney was?” Cat said. “I told him to eat two turds and die. Those can’t be the last words I ever say to my brother.” She cupped her face in her hands. “My mom and I were supposed to take this opera class where they teach you how to sing falsetto. My dad promised to cartwheel me down the aisle at my wedding.…” She stared at Eureka’s father, semiconscious in the mud, and seemed to be seeing her own father. “You have to fix this, Eureka. And not like when you duct taped your mom’s rearview mirror back on. I mean, really fix, like,everything.”

“I know,” Eureka said. “I’ll find help. You’ll call your family. You’ll tell Barney what he already knows, that you love him.”

“Right.” Cat sniffed. “I’ll stay here. You two go.” She laid her blanket of seaweed over Dad, then sat down miserably on a rock. She drew the twins into her lap, tried to cover their heads with her cardigan. This was a girl who refused to join summer camping trips if there was the slightest chance of drizzle.

“Let me help you.” Eureka tried to stretch the cardigan over the twins and her friend. She felt a twist of heat behind her and spun around.

Under a crook of rock extending from the boulder, Ander had started a small fire using scraps of wood debris. It blazed at Dad’s feet, mostly out of the rain.

“How did you do that?” she asked.

“Only takes a couple of breaths to dry out wood. The rest was easy.” He lifted a corner of the seaweed blanket to reveal a pile of dry twigs and larger wood chips. “If you need more fuel before we’re back,” he said to Cat.

“You should stay with my dad,” she told Ander. “Your cordon could protect him—”

He looked away. “My family can erect cordons bigger than football fields. I can’t even shelter someone standing right beside me.”

“But back there, in your arms after the wave—” Eureka said.

“That just happened without me trying, but when I try …” He shook his head. “I’m still learning my strength. They say it gets easier.” He glanced over her shoulder, as if reminded of his family. “We should hurry.”

“You don’t even know where we are, where we’re going—”

“I know two things,” Ander said, “the wind and you. The wind is the way I got us across this ocean and you are the reason why. But I can only help you if you’ll trust me.”

Eureka remembered the day he’d found her running in the woods in the innocent rain. He’d dared her to get her thunderstone wet. She’d laughed because it sounded so absurd. You could get anything wet.

If it turns out I’m right, he’d said, will you promise to trust me?

Eureka liked trusting him. It gave her physical pleasure to trust him, to touch his fingertips and say the words aloud: “I trust you.”

She looked behind her and saw lightning strike a distant wave. She wondered what happened at the point of impact. She turned and gazed at the mountains and wondered what lay on the other side.

She tightened her grip on the purple tote bag under her arm. Wherever she was going, The Book of Love was going, too. She leaned down to kiss her father. His eyelids tensed but didn’t open. She hugged the twins.