Apollyon

Alex has awakened and transformed into the Apollyon. She has become linked to Seth, and the very thing she feared most has come to pass: she has lost herself. But love is stronger than fate, and Aiden St. Delphi will do whatever it takes to sever that connection and get Alex back. Furthermore, the combination of Alex and Seth is incredibly dangerous: if Seth drains Alex’s power, he will become the God-Killer—the most powerful creature on the planet. The only person capable of stopping this imminent destruction has been dead for centuries, and Alex must venture into the Underworld to find her. Simply making her way into the Underworld to search for one soul among millions will be difficult enough; returning will be even harder. Alex must prevent Seth from becoming the God-Killer—but the price will be higher than she could have ever imagined.