Goblin Princess

From publisher blurb: Once upon a time, the chieftain of the Redfang tribe had a daughter so dangerous that he feared she would usurp him, so he called upon seven swamp hags to share their wisdom and advice, and together they hatched a plan. On your sixteenth birthday, you pricked your back on several poisoned arrows, and fell asleep just long enough for your father to drag you to a nearby tower, lock you up, and throw away the key. Thick metal bars across the windows prevented you from escaping, and most of the tribe forgot about you, but you managed to survive on insects, rats, birds, and the occasional suitor foolish enough to scale the tower. And there you remained, trapped in the tower for 100 days, until one day a foolish pack of ogres decided to “kidnap” you.