How does Aidan find out about Paige?

How do Aidan and Paige change throughout the novel?

Why does Paige get involved with the Movement?

Who is Simon Krauss, and why is he important to the novel's plot?

What does Paige want Aidan to do when she first arrives at his apartment?

Why does Paige abandon Keith and Lindsay?

How does Paige ruin Aidan's life? Does Aidan think she ruined his life?

Who betrays Aidan, and why? How does Aidan feel about this?