Meet a brave little mermaid searching for a very special treasure in this heart-warming celebration of friendship, creativity and digging deep for determination! Meet Oona. She's a little mermaid who loves special treasure and big adventures – and often ends up in big trouble!But with her best friend Otto by her side, Oona is on the hunt for the grandest treasure of all – and she's about to find out it's not what she thought it was... A wonderfully watery tale of friendship, creativity and digging deep for determination, Oona is about to be your new best friend! From the New York Times bestselling author Kelly DiPucchio.