The Lost Island of Tamarind by Nadia Aguiar

Maya is 13 and lives with her parents and two siblings on the sea. All she wants is to live on dry land and go to school like a normal girl. But soon a storm hits and her parents are washed overboard and she, her brother and baby sister end up on a magical island with wild children, pirates and sea monsters. A great adventure reminiscent of Peter Pan. Also very young. I vote nay.