Meet a brave little mermaid searching for a very special treasure in this heart-warming and gorgeously illustrated 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...