The Staff of Serapis (Demigods & Magicians, #2)

by Rick Riordan

“Don’t think,” Sadie advised. “Breathe.

She’d spent her whole life learning about the Mist—the magical boundary that separated the mortal world from the world of Greek monsters and gods. But she’d never thought of the Mist as an actual curtain. What had Sadie called it—the Duat? Annabeth wondered if the Mist and the Duat were related, or maybe even the same thing.

Annabeth recalled a quote her friend Frank had once shared with her—something from Sun Tzu’s The Art of War. When weak, act strong.