"Do you know who I am?" she demanded. "Well, you're Night, I suppose," said Annabeth. "I mean, I can tell because you're dark and everything, though the brochure didn't say much about you." Nyx's eyes winked out for a moment. "What brochure?" Annabeth patted her pockets. "We had one, didn't we?" Percy licked his lips. "Uh-huh." He was still watching the horses, his hand tight on his sword hilt, but he was smart enough to follow Annabeth's lead. [...] "Anyway," she said, "I guess the brochure didn't say much, because you weren't spotlighted on the tour. We got to see the River Phlegethon, the Cocytus, the arai, the poison glade of Akhlys, even some random Titans and giants, but Nyx...hmm, no you weren't really featured." "Featured? Spotlighted?" "Yeah," Percy said, warming up to the idea. "We came down here for the Tartarus tour--like, exotic destinations, you know? The Underworld is overdone. Mount Olympus is a tourist trap--" "Gods, totally!" Annabeth agreed. "So we booked the Tartarus excursion, but no one even mentioned we'd run into Nyx. Huh. Oh, well. Guess they didn't think you were important."