Instruct: Classify the given Amazon review as either positive or negative.
Query: What's Nina been hiding all these years?

Nina's in love with her sister's ex-boyfriend. She can't tell anyone because she thinks he won't love her back. Also, when the past becomes reality, Nina has to face her abusive uncle and let her secret out. Nina is my absolute fave character in the series and her 'three-part comic tautology rule' is sooo cool! But underneath the witty exterior she's very sensitive and the most troubled of all the island kids. This is one of my most favourite books in the series because it deals with something really serious.