“A grove,” Meg said. “Like trees.”

“Yes, Meg, like trees. Groves are typically composed of trees, rather than, say, Fudgsicles. Dodona was a stand of sacred oaks planted by the Mother Goddess in the first days of the world. They were ancient even when the Olympians were born.”

“The Mother Goddess?” Rachel shivered in her patina jacket. “Please tell me you don’t mean Gaea.”

“No, thankfully. I mean Rhea, Queen of the Titans, the mother of the first generation of Olympian gods. Her sacred trees could actually speak. Sometimes they issued prophecies.”

“The voices in the woods,” Meg guessed.

“Exactly. I believe the Grove of Dodona has regrown itself here in the woods at camp. In my dreams, I saw a crowned woman imploring me to find her Oracle. I believe it was Rhea, though I still don’t understand why she was wearing a peace symbol or using the term dig it.”

“A peace symbol?” Chiron asked.

“A large brass one,” I confirmed.

Rachel drummed her fingers on the couch’s armrest. “If Rhea is a Titan, isn’t she evil?”

“Not all Titans were bad,” I said. “Rhea was a gentle soul. She sided with the gods in their first great war. I think she wants us to succeed. She doesn’t want her grove in the hands of our enemies.”

Chiron’s tail twitched. “My friend, Rhea has not been seen for millennia. Her grove was burned in the ancient times. Emperor Theodosius ordered the last oak cut down in—”

“I know.” I got a stabbing pain right between my eyes, as I always did when someone mentioned Theodosius. I now recalled that the bully had closed all the ancient temples across the empire, basically evicting us Olympian gods. I used to have an archery target with his face on it. “Nevertheless, many things from the old days have survived or regenerated. The Labyrinth has rebuilt itself. Why couldn’t a grove of sacred trees spring up again right here in this valley?”

Meg pushed herself deeper into the cushions. “This is all weird.” Leave it to the young McCaffrey to summarize our conversation so effectively. “So if the tree voices are sacred and stuff, why are they making people get lost?”

“For once, you ask a good question.” I hoped such praise wouldn’t go to Meg’s head. “In the old days, the priests of Dodona would take care of the trees, pruning them, watering them, and channeling their voices by hanging wind chimes in their branches.”

“How would that help?” Meg asked.

“I don’t know. I’m not a tree priest. But with proper care, these trees could divine the future.”

Rachel smoothed her skirt. “And without proper care?”

“The voices were unfocused,” I said. “A wild choir of disharmony.” I paused, quite pleased with that line. I was hoping someone might write it down for posterity, but no one did. “Untended, the grove could most definitely drive mortals to madness.”

Chiron furrowed his brow. “So our missing campers are wandering in the trees, perhaps already insane from the voices.”

“Or they’re dead,” Meg added.

“No.” I could not abide that thought. “No, they are still alive. The Beast is using them, trying to bait me.”

“How can you be sure?” Rachel asked. “And why? If Python already controls Delphi, why are these other Oracles so important?”

I gazed at the wall formerly graced by my picture. Alas, no answers magically appeared in the whitewashed space. “I’m not sure. I believe our enemies want to cut us off from every possible source of prophecy. Without a way to see and direct our fates, we will wither and die—gods and mortals alike, anyone who opposes the Triumvirate.”

Meg turned upside down on the sofa and kicked off her red shoes. “They’re strangling our taproots.” She wriggled her toes to demonstrate.

I looked back at Rachel, hoping she would excuse my street urchin overlord’s bad manners. “As for why the Grove of Dodona is so important, Python mentioned that it was the one Oracle he could not control. I don’t understand exactly why—perhaps because Dodona is the only Oracle that has no connection with me. Its power comes from Rhea. So if the grove is working, and it is free of Python’s influence, and it is here at Camp Half-Blood—”

“It could provide us with prophecies.” Chiron’s eyes gleamed. “It could give us a chance against our enemies.”

I gave Rachel an apologetic smile. “Of course, we’d rather have our beloved Oracle of Delphi working again. And we will, eventually. But for now, the Grove of Dodona could be our best hope.”

Meg’s hair swept the floor. Her face was now the color of one of my sacred cattle. “Aren’t prophecies all twisted and mysterious and murky, and people die trying to escape them?”

“Meg,” I said, “you can’t trust those reviews on RateMyOracle.com. The hotness factor for the Sibyl of Cumae, for instance, is completely off. I remember that quite clearly.”