The title of each book Persephone narrates come from her titles. Her titles defined her in mythology. Her role and personality changed with each one. So, one question per book, first right answer on all three wins an ecopy of Iron Queen.
1) Persephone didn’t start out as Persephone. She had another name before she was abducted. What was it, and what did it mean? There are several variations on spelling, I’ll take any of them.
2) Who does the earth and sky bit of the title Daughter of the Earth and Sky refer to? Why do you think it was relevant for that book? That last question is opinion based, so any answer is right.
3) Who called Persephone the Iron Queen. Why?