When Maggie learns that everyone at her new middle school belongs to a club, she decides to try the swim team then, using her magic boots, spends a day in the life of Marina Tide, a famous oceanographer's daughter who travels the world doing good, just as someone is setting up Marina and her father.

Jenna McCarthy is a writer, speaker and aspiring drummer who has wanted magical boots since she learned to walk. She lives with her husband, daughters, dogs and cats in sunny Southern California.