Wrath of Olympus The God King Returns

Five years ago, Serena rescued Ares, an exiled heir to the War God, and quietly raised their daughter Zoe after giving birth in secret. Now Zoe's demigod blood is stirring, and it has caught the eye of rival factions in the underworld. When mother and daughter are abducted, Serena's bracelet calls Ares back from the battlefield, and the God King answers. He sets out to save his family and wage war against the Council, determined to lift the curse on Zoe and learn why he was cast out.