We call it the Prophecy of Seven. Octavian, you have it committed to memory?
-- Reyna (Chapter 3 paragraph Page 21)

Importance: This is significant because it kicks off the entire novel sequence of events. Because of what is written here, seven demigods from both camps will be selected to go on the quest.

Maybe,” Percy ventured, “you should bring our other friends here. You know, spectacular deaths… the more the merrier, right?
-- Percy (Chapter 45 paragraph Page 510)

Importance: This shows Percy's ability under pressure. He's trying to buy time for himself and his friends while in the twin giant's theater, where they rescue Nico.

Annabeth knew that expression. She saw it every time she looked in a mirror.
-- Narrator (Chapter 2 paragraph Page 12)

Importance: This line is quite important because it shows that Annabeth sees herself in Reyna and finds that she both likes, respects, and understands her because of it.

You’re just a pawn on the chessboard, Leo Valdez.
-- Nemesis (Chapter 6 paragraph Page 70)

Importance: This quote is a chilling precursor to a...