I pulled out Riptide.

He understood how dangerous oaths could be. But Leo didn't care. "I'm coming back for you, Calypso," he said to the night wind. "I swear it on the River Styx.

Hazel frowned. "Why that one?" "You don't see the ghost?" Frank asked. "Ghost?" Nico asked. Okay... if Frank was seeing a ghost that the Underworld kids couldn't see, something was definitely wrong.

Unless you stop him. Perhaps next we meet." "You'll be just as annoying?" I guessed. He fixed my with those warm brown eyes. "Or perhaps you could bring me up to speed on those modern courtship rituals." I sat there stunned until he gave me a glimpse of a smile-just enough to let me know he was teasing. Then he disappeared. "Oh, very funny!" I yelled.

Also ... the plan sounded exactly like the sneaky, twisted, ridiculously annoying and noble sort of thing Leo Valdez would do.

Grover started to sniffle and I figured if I didn't cheer him up he'd either start bawling or chewing up my mattress. He tends to eat household objects whenever he gets upset.

Otis barreled towards them empty-handed, before apparently realizing that a) he was empty-handed and b) charging towards a large body of water to fight a son of Poseidon was maybe not a good idea.