" Looking at the elementary schoolers in their colorful T-shirts from various day camps, Percy felt a twinge of sadness. He should be at Camp Half-Blood right now, settling into his cabin for the summer, teaching sword-fighting lessons in the arena, playing pranks on the other counselors. These kids had no idea just how crazy a summer camp could be. "

― Rick Riordan , The Mark of Athena (The Heroes of Olympus, #3)