Is it possible that the story of Hades and Persephone would go on a lot of volumes in the future? And, will there be a new character/god/goddess that you created and put it into Greek mythology? Thank you =)

Yep. This will be an 8-9 book series. I’m currently writing book 3. All characters, barring a handful of minor ones will be either straight out of mythology or select historical figures from antiquity.