The Mark of Athena

Now it occurred to him that Frank might have had a bad experience with fire. Leo’s own mom had died in a machine shop blaze. Leo had been blamed for it. He’d grown up being called a freak, an arsonist, because whenever he got angry, things burned.

“Sorry I laughed,” he said, and he meant it. “My mom died in a fire. I understand being afraid of it. Did, uh…did something like that happen with you?”

Frank seemed to be weighing how much to say. “My house…my grandmother’s place. It burned down. But it’s more than that…” He stared at the sea urchins on the floor. “Annabeth said I could trust the crew. Even you.”

“Even me, huh?” Leo wondered how that had come up in conversation. “Wow, high praise.”

“My weakness…” Frank started, like the words cut his mouth. “There’s this piece of firewood—”

The abalone door rolled open.

Leo turned and found himself face-to-face with Lima Bean Man, who wasn’t actually a man at all. Now that Leo could see him clearly, the guy was by far the weirdest creature he’d ever met, and that was saying a lot.

From the waist up, he was more or less human—a thin, bare-chested dude with a dagger in his belt and a band of seashells strapped across his chest like a bandolier. His skin was green, his beard scraggly brown, and his longish hair was tied back in a seaweed bandana. A pair of lobster claws stuck up from his head like horns, turning and snapping at random.

Leo decided he didn’t look so much like Chiron. He looked more like the poster Leo’s mom used to keep in her workspace—that old Mexican bandit Pancho Villa, except with seashells and lobster horns.

From the waist down, the guy was more complicated. He had the forelegs of a blue-green horse, sort of like a centaur, but toward the back, his horse body morphed into a long fishy tail about ten feet long, with a rainbow- colored, V-shaped tail fin.

Now Leo understood what Frank meant about fish-horse guys.

“I am Bythos,” said the green man. “I will interrogate Frank Zhang.”

His voice was calm and firm, leaving no room for debate.

“Why did you capture us?” Leo demanded. “Where’s Hazel?”

Bythos narrowed his eyes. His expression seemed to say: Did this tiny creature just talk to me? “You, Leo Valdez, will go with my brother.”

“Your brother?”

Leo realized that a much larger figure was looming behind Bythos, with a shadow so wide, it filled the entire cave entrance.

“Yes,” Bythos said with a dry smile. “Try not to make Aphros mad.”

APHROS LOOKED LIKE HIS BROTHER, except he was blue instead of green and much, much bigger. He had Arnold-as-Terminator abs and arms, and a square, brutish head. A huge Conan-approved sword was strapped across his back. Even his hair was bigger—a massive globe of blue-black frizz so thick that his lobster-claw horns appeared to be drowning as they tried to swim their way to the surface.

“Is that why they named you Aphros?” Leo asked as they glided down the path from the cave. “Because of the Afro?”

Aphros scowled. “What do you mean?”

“Nothing,” Leo said quickly. At least he would never have trouble remembering which fish dude was which. “So what are you guys, exactly?”

“Ichthyocentaurs,” Aphros said, like it was a question he was tired of answering.

“Uh, icky what?”

“Fish centaurs. We are the half brothers of Chiron.”

“Oh, he’s a friend of mine!”

Aphros narrowed his eyes. “The one called Hazel told us this, but we will determine the truth. Come.”

Leo didn’t like the sound of determine the truth. It made him think of torture racks and red-hot pokers.

He followed the fish centaur through a massive forest of kelp. Leo could’ve darted to one side and gotten lost in the plants pretty easily, but he didn’t try. For one thing, he figured Aphros could travel much faster in the water, and the guy might be able to shut off the magic that let Leo move and breathe. Inside or outside the cave, Leo was just as much a captive.

Also, Leo had no clue where he was.

They drifted between rows of kelp as tall as apartment buildings. The green-and-yellow plants swayed weightlessly, like columns of helium balloons. High above, Leo saw a smudge of white that might have been the sun.

He guessed that meant they’d been here overnight. Was the Argo II all right? Had it sailed on without them, or were their friends still searching?

Leo couldn’t even be sure how deep they were. Plants could grow here—so not too deep, right? Still, he knew he couldn’t just swim for the surface. He’d heard about people who ascended too quickly and developed nitrogen bubbles in their blood. Leo wanted to avoid carbonated blood.

They drifted along for maybe half a mile. Leo was tempted to ask where Aphros was taking him, but the big sword strapped to the centaur’s back sort of discouraged conversation.