"He reached out a hand to the middle head of the dog and scratched it beneath the chin. One of the beast's rear legs began to thump rapidly against the floor. It sounded like something you'd hear coming from inside a machine shop. "Do you know my dog's name?" "Cerberus," I said promptly. "But everyone knows that." "Do you know what it means?" I opened my mouth and closed it again. I shook my head. "It is from an ancient word, kerberos. It means 'spotted.'" I blinked. "You're a genuine Greek god. You're the Lord of the Underworld. And . . . you named your dog Spot?" "Who's a good dog?" Hades said, scratching the third head behind the ears, and making the beast's mouth drop open in a doggy grin. "Spot is. Yes, he is."