It was if the city knew about Percy's dream of Gaea. It knew that the earth goddess intended on razing all human civilization, and this city, which had stood for thousands if years, was saying back at her: You wanna dissolve this city, Dirt Face? Give it a shot. In other words, it was the Coach Hedge of mortal cities- only taller.

Monsters don't die. They just dissipate into smoke and dust, which saves heroes a lot of trouble cleaning up after a fight.

They're not so bad. They just need some attention. ...Like pets. Or my brother.

Brother dear,” I said, “did your soul leave your body while Amos was talking, or did you actually hear him? Egyptian gods real. Red Lord bad. Red Lord’s birthday: very soon, very bad. House of Life: fussy magicians who hate our family because dad was a bit of a rebel, whom you could take a lesson from. Which leaves us—just us—with Dad missing, an evil god about to destroy the world, and an uncle who just jumped off the building—and I can’t actually blame him.” I took a breath. [Yes, Carter, I do have to breathe occasionally.]

Leo Valdez deserved a special punishment," she [Khione] said. "I have sent him to a place from which he can never return.

The real world is where the monsters are.

Percy," my father said, "what exactly do you mean?" "Kronos couldn't have risen if it hadn't been for a lot of demigods who felt abandoned by their parents," I said. "They felt angry, resentful, and unloved, and they had a good reason.