The Lightning Thief (Percy Jackson and the Olympians, #1)

by Rick Riordan

“So if the gods fight,” I said, “will things line up the way they did with the Trojan War? Will it be Athena versus Poseidon?” She put her head against the backpack Ares had given us, and closed her eyes. “I don’t know what my mom will do. I just know I’ll fight next to you.” “Why?” “Because you’re my friend, Seaweed Brain. Any more stupid questions?”

Look how far they've come! :'D

She swallowed. “Wear this, at least. For luck.” She took off her necklace, with her five years’ worth of camp beads and the ring from her father, and tied it around my neck. “Reconciliation,” she said. “Athena and Poseidon together.”

:'D