The Heroes of Olympus. Book 3. The Mark of Athena

Yeah.” Percy smiled. “We’ve got a dam hole.”
“What?” Piper asked.
“Nothing,” he said. “Inside joke

Who is Festus?”
“My friend,” Leo said. “His name isn’t Sammy either, in case you’re wondering. Come on. I’ll introduce you.”

At that moment, Annabeth forgave her ridiculous boyfriend for everything he’d ever done wrong. She wanted to throw her arms around him, but she commanded herself to stay cool.