Coco Banjo Is Having a Yay Day — N.J. Gemmell

Coco Banjo loves her life. She sleeps in a tiger onesie, wears her mom's diamonds just because she can, and has dolphins and penguins for friends. Today Coco's planning a Yay Day of fun on her secret island home in the middle of Sydney Harbour. But wait . . . what's that Secret Signal? Oh no, Narianna (known as N) is being bullied! Coco sets off for school to rescue her. But when cranky school principal Miss Trample sees Coco's school uniform (customized, thank you very much), Coco might be in even more trouble than her best friend. How will she get out of this one?