Who is Calla? Why does she wake up in a Searcher's prison cell? Why does Calla react to Monroe with hostility? How does Calla react to Evan and Connor? Why does Calla dislike Connor's constant joking? Why does Connor constantly joke? Why does Calla dislike Ariadne when she first meets her? How does Calla feel about seeing Shay at first? What is it about Shay that causes Calla some pause at several points in the novel?

Who is Shay? What is the Scion? Why did Calla give up everything to save Shay? What do the Searchers think Shay represents to them? Who is Shay's father? Who is Shay's uncle? What is significant about Shay's relatives? What is the Scion's Cross? Why does Silas want to collect the four pieces of the Scion's Cross? Why does Calla suggest they only need to collect three?

Who...