What does Ares say that convinces Percy to help him?

What news does Ares give Percy about his mom?

What do the beads mean on Annabeth's necklace?

Where did they release the animals?

Where do the truckers say the zebra is going?

When Percy finds Annabeth in the casino, she is playing on a slot machine. 

What channel does Annabeth turn on in the hotel?

At the Lotus Hotel, what type of games do Grover, Annabeth, and Percy enjoy playing?

When does Percy start to realize the casino is a trap?

How does Percy snap Annabeth out of her trance?

How does Annabeth pay for the trip to Los Angeles?

Who is the spirit in the sea?

Percy, Grover, and Annabeth spent 6 days in the Lotus Hotel. 

What does the Neried give to Percy?

Why doesn't Riptide work on the kids who jump Percy in the alley?

What does Crusty do to his customers?

Why can't Percy simply fight Crusty?

What is Crusty's real name?

How does Percy trick the giant?

How does Percy find the address for the Underworld?

The DOA Recording studio security guard get annoyed with Percy because he called Charon, Chiron.

How does Percy finally convince Charon to take them into the elevator?

What does the River Styx look like?

How does Annabeth save them from Cerberus?

What does Percy realize about monsters at the end of the chapter 18?