When did Percy, Hazel, and Frank first meet Ella?
What year did Hazel die?
Who are the two gorgons that Percy fights at the beginning of the story?
What's the name of the skeleton that comes out of Frank's spear?
Hazel is the daughter of which Greek god?
What does Hazel discover her power is?
What does Frank's grandmother call him?
What is Frank's family gift?
Which of the Big Three gods is Frank a descendant of?
Who frees Thanatos?