The Waking Land by Callie Bates

Lady Elanna Valtai is fiercely devoted to the King who raised her like a daughter. But when he dies under mysterious circumstances, Elanna is accused of his murder and must flee for her life.

Returning to the homeland of magical legends she has forsaken, Elanna is forced to reckon with her despised, estranged father, branded a traitor long ago. Feeling a strange, deep connection to the natural world, she also must face the truth about the forces she has always denied or disdained as superstition powers that suddenly stir within her.

But an all-too-human threat is drawing near, determined to exact vengeance. Now Elanna has no choice but to lead a rebellion against the kingdom to which she once gave her allegiance. Trapped between divided loyalties, she must summon the courage to confront a destiny that could tear her apart.