Piper leaned against the control panel. She’d done her braid with white feathers today, which looked good with her dark brown hair. Annabeth wondered how she found the time. Annabeth could barely remember to brush her hair.

“A map,” Piper said. “But a map to what?”

“The Mark of Athena.” Percy looked cautiously at Annabeth, like he was afraid he’d overstepped. She must have been putting out a strong I don’t want to talk about it vibe.

“Whatever that is,” he continued. “We know it leads to something important in Rome, something that might heal the rift between the Romans and Greeks.”

“The giants’ bane,” Hazel added.

Percy nodded. “And in my dream, the twin giants said something about a statue.”

“Um…” Frank rolled his not-exactly-Chinese handcuffs between his fingers. “According to Phorcys, we’d have to be insane to try to find it. But what is it?”

Everyone looked at Annabeth. Her scalp tingled, as if the thoughts in her brain were agitating to get out: a statue…Athena…Greek and Roman, her nightmares, and her argument with her mom. She saw how the pieces were coming together, but she couldn’t believe it was true. The answer was too big, too important, and much too scary.

She noticed Jason studying her, as if he knew exactly what she was thinking and didn’t like it any more than she did. Again she couldn’t help but wonder: Why does this guy make me so nervous? Is he really on my side? Or maybe that was her mom talking.…

“I—I’m close to an answer,” she said. “I’ll know more if we find this map. Jason, the way you reacted to the name Charleston…have you been there before?”

Jason glanced uneasily at Piper, though Annabeth wasn’t sure why.

“Yeah,” he admitted. “Reyna and I did a quest there about a year ago. We were salvaging Imperial gold weapons from the C.S.S. Hunley.”

“The what?” Piper asked.

“Whoa!” Leo said. “That’s the first successful military submarine. From the Civil War. I always wanted to see that.”

“It was designed by Roman demigods,” Jason said. “It held a secret stash of Imperial gold torpedoes—until we rescued them and brought them back to Camp Jupiter.”

Hazel crossed her arms. “So the Romans fought on the Confederate side? As a girl whose grandmother was a slave, can I just say…not cool?”

Jason put his hands in front of him, palms up. “I personally was not alive then. And it wasn’t all Greeks on one side and all Romans on the other. But, yes. Not cool. Sometimes demigods make bad choices.” He looked sheepishly at Hazel. “Like sometimes we’re too suspicious. And we speak without thinking.”

Hazel stared at him. Slowly it seemed to dawn on her that he was apologizing.

Jason elbowed Leo.

“Ow!” Leo yelped. “I mean, yeah…bad choices. Like not trusting people’s brothers who, you know, might need saving. Hypothetically speaking.”

Hazel pursed her lips. “Fine. Back to Charleston. Are you saying we should check that submarine again?”

Jason shrugged. “Well…I can think of two places in Charleston we might search. The museum where they keep the Hunley—that’s one of them. It has a lot of relics from the Civil War. A map could be hidden in one. I know the layout. I could lead a team inside.”

“I’ll go,” Leo said. “That sounds cool.”

Jason nodded. He turned to Frank, who was trying to pull his fingers out of the Chinese handcuffs. “You should come too, Frank. We might need you.”

Frank looked surprised. “Why? Not like I was much good at that aquarium.”

“You did fine,” Percy assured him. “It took all three of us to break that glass.”

“Besides, you’re a child of Mars,” Jason said. “The ghosts of defeated causes are bound to serve you. And the museum in Charleston has plenty of Confederate ghosts. We’ll need you to keep them in line.”

Frank gulped. Annabeth remembered Percy’s comment about Frank turning into a giant goldfish, and she resisted the urge to smile. She would never be able to look at the big guy again without seeing him as a koi.

“Okay.” Frank relented. “Sure.” He frowned at his fingers, trying to pull them out of the trap. “Uh, how do you—?”

Leo chuckled. “Man, you’ve never seen those before? There’s a simple trick to getting out.”

Frank tugged again with no luck. Even Hazel was trying not to laugh.

Frank grimaced with concentration. Suddenly, he disappeared. On the deck where he’d been standing, a green iguana crouched next to an empty set of Chinese handcuffs.

“Well done, Frank Zhang,” Leo said dryly, doing his impression of Chiron the centaur. “That is exactly how people beat Chinese handcuffs. They turn into iguanas.”

Everybody busted out laughing. Frank turned back to human, picked up the handcuffs, and shoved them in his backpack. He managed an embarrassed smile.

“Anyway,” Frank said, clearly anxious to change the subject. “The museum is one place to search. But, uh, Jason, you said there were two?”

Jason’s smile faded. Whatever he was thinking about, Annabeth could tell it wasn’t pleasant.

“Yeah,” he said. “The other place is called the Battery—it’s a park right by the harbor. The last time I was there…with Reyna…” He glanced at Piper, then rushed on. “We saw something in the park. A ghost or some sort of spirit, like a Southern belle from the Civil War, glowing and floating along. We tried to approach it, but it disappeared whenever we got close. Then Reyna had this feeling—she said she should try it alone. Like maybe it would only talk to a girl. She went up to the spirit by herself, and sure enough, it spoke to her.”

Everyone waited.

“What did it say?” Annabeth asked.

“Reyna wouldn’t tell me,” Jason admitted. “But it must have been important. She seemed…shaken up. Maybe she got a prophecy or some bad news. Reyna never acted the same around me after that.”

Annabeth considered that. After their experience with the eidolons, she didn’t like the idea of approaching a ghost, especially one that changed people with bad news or prophecies. On the other hand, her mom was the goddess of knowledge, and knowledge was the most powerful weapon. Annabeth couldn’t turn down a possible source of information.

“A girls’ adventure, then,” Annabeth said. “Piper and Hazel can come with me.”

Both nodded, though Hazel looked nervous. No doubt her time in the Underworld had given her enough ghost experiences for two lifetimes. Piper’s eyes flashed defiantly, like anything Reyna could do, she could do.

Annabeth realized that if six of them went on these two quests, it would leave Percy alone on the ship with Coach Hedge, which was maybe not a situation a caring girlfriend should put him in. Nor was she eager to let Percy out of her sight again—not after they’d been apart for so many months. On the other hand, Percy looked so troubled by his experience with those imprisoned sea creatures, she thought maybe he could use a rest. She met his eyes, asking him a silent question. He nodded as if to say, Yeah. It’ll be fine.

“So that’s settled.” Annabeth turned to Leo, who was studying his console, listening to Festus creak and click over the intercom. “Leo, how long until we reach Charleston?”

“Good question,” he muttered. “Festus just detected a large group of eagles behind us—long-range radar, still not in sight.”

Piper leaned over the console. “Are you sure they’re Roman?”

Leo rolled his eyes. “No, Pipes. It could be a random group of giant eagles flying in perfect formation. Of course they’re Roman! I suppose we could turn the ship around and fight—”

“Which would be a very bad idea,” Jason said, “and remove any doubt that we’re enemies of Rome.”

“Or I’ve got another idea,” Leo said. “If we went straight to Charleston, we could be there in a few hours. But the eagles would overtake us, and things would get complicated. Instead, we could send out a decoy to trick the eagles. We take the ship on a detour, go the long way to Charleston, and get there tomorrow morning—”

Hazel started to protest, but Leo raised his hand. “I know, I know. Nico’s in trouble and we have to hurry.”

“It’s June twenty-seventh,” Hazel said. “After today, four more days. Then he dies.”

“I know! But this might throw the Romans off our trail. We still should have enough time to reach Rome.”

Hazel scowled. “When you say should have enough…”

Leo shrugged. “How do you feel about barely enough?”

Hazel put her face in her hands for a count of three. “Sounds about typical for us.”

Annabeth decided to take that as a green light. “Okay, Leo. What kind of decoy are we talking about?”

“I’m so glad you asked!” He punched a few buttons on the console, rotated the turntable, and repeatedly pressed the A button on his Wii controller really, really fast. He called into the intercom, “Buford? Report for duty, please.”

Frank took a step back. “There’s somebody else on the ship? Who is Buford?”

A puff of steam shot from the stairwell, and Leo’s automatic table climbed on deck.

Annabeth hadn’t seen much of Buford during the trip. He mostly stayed in the engine room. (Leo insisted that Buford had a secret crush on the engine.) He was a three-legged table with a mahogany top. His bronze base had several drawers, spinning gears, and a set of steam vents. Buford was toting a bag like a mail sack tied to one of his legs. He clattered to the helm and made a sound like a train whistle.

“This is Buford,” Leo announced.

“You name your furniture?” Frank asked.

Leo snorted. “Man, you just wish you had furniture this cool. Buford, are you ready for Operation End Table?”

Buford spewed steam. He stepped to the railing. His mahogany top split into four pie slices, which elongated into wooden blades. The blades spun, and Buford took off.

“A helicopter table,” Percy muttered. “Gotta admit, that’s cool. What’s in the bag?”

“Dirty demigod laundry,” Leo said. “I hope you don’t mind, Frank.”

Frank choked. “What?”

“It’ll throw the eagles off our scent.”

“Those were my only extra pants!”

Leo shrugged. “I asked Buford to get them laundered and folded while he’s out. Hopefully he will.” He rubbed his hands and grinned. “Well! I call that a good day’s work. I’m gonna calculate our detour route now. See you all at dinner!”

Percy passed out early, which left Annabeth with nothing to do in the evening except stare at her computer.

She’d brought Daedalus’s laptop with her, of course. Two years ago, she’d inherited the machine from the greatest inventor of all time, and it was loaded with invention ideas, schematics, and diagrams, most of which Annabeth was still trying to figure out. After two years, a typical laptop would have been out of date, but Annabeth figured Daedalus’s machine was still about fifty years ahead of its time. It could expand into a full-size laptop, shrink into a tablet computer, or fold into a wafer of metal smaller than a cell phone. It ran faster than any computer she’d ever had, could access satellites or Hephaestus-TV broadcasts from Mount Olympus, and ran custom-made programs that could do just about anything except tie shoelaces. There might have been an app for that, too, but Annabeth hadn’t found it yet.