Journey to the Mercy Mines — Robin Glassey

In this the third book in The Azetha Series, Tika faces her greatest challenge yet as she enters the kingdom of Soren to rescue her father from the Mercy Mines. But Mortan and his followers aren't the only ones Tika has to watch out for. She doesn't travel very far before falling into Prince Perdon's trap. She is forced to battle against phantom voices, hide from Sha'Vhen, and even battle her best friend Herra as she tries to escape Perdon's Elemental "collection" all while her father struggles to survive in the Mercy Mines. It's hard to rescue your father when you can't even rescue yourself.