Heir of Broken Kingdom by Mads Rafferty

Book 2

Delilah and Knox thought defeating the dark magic was the end. 
But fate, it seems, has a lot more planned for Delilah.

Forced to return to the human lands ravished by evil and oppression, the golden princess must once again rise to the occasion—this time, to destroy her father.

As they gather allies new and old to finally abolish his violent reign, they’ll discover that all they’ve ever known is no longer the truth…and that betrayal lingers closer than any of them imagined.