Mean Princess Poison has ruined the blue lagoon and made the mermaids who live there homeless! Charlotte and Mia have to grant four watery wishes to break the evil curse.

Ava loves helping out at her local marine life centre, especially when the baby sea turtles are about to hatch! She just wishes that they would get to the sea safely ... Can Charlotte and Mia help her wish come true?

This is book 18 in Secret Princesses .

There are 128 pages in this book. This book was published 2018 by Hachette Children's Group .

Rosie Banks is the author of brilliant series Secret Princesses and Secret Kingdom .