Shelly is a mermaid with a very big secret, and keeping it is about to get much harder. Her great-aunt is coming for a visit, which would normally be exciting, except her great-aunt happens to be the Queen of the Western Oceans. Now Shelly is incredibly nervous about hosting such a royal guest in Trident City. She worries that she will not know the right things to say or do, and even worse, she fears the Queen might decide Trident City is not a proper place for a young princess to live. Shelly loves her school, her friends, and her underwater home, and she does not want to be forced to move away to a grand, boring palace. Readers will relate to the pressure of wanting to impress visiting family while staying true to themselves. This underwater fantasy chapter book offers a charming story about family expectations, the true meaning of royalty, and the deep value of home and friendship.