Books in the Mermaid School series

It is Marnie Blue's very first day at Lady Sealia Foam's Mermaid School, and she's terrified. What's more, her famous diva aunt Christabel was a notorious rebel at the same school, and got up to all sorts of naughtiness. Marnie is soon branded a troublemaker by her grumpy octopus music teacher and wants nothing more than to clam up.

Marnie Blue is so excited! She is going on a school trip to see the legendary palace of Queen Maretta with all her friends. But when Mum is too unwell to join the trip, Aunt Christabel agrees to come in her place, and she was offishially the naughtiest mermaid the school has ever known. Marnie expects mayhem. Will they board the whale-shark on time? Will everyone eat their packed lunches on the way there? And just who is sneaking around the palace causing all sorts of mischief?

Marnie Blue is shocked when lots of plastic rubbish starts to appear in Mermaid Lagoon. It's causing all sorts of problems and even harming the underwater animals. Marnie and her friends decide enough is enough and they must have a big green clean-up. But just where is all the plastic coming from? With the help of the local Brinies group, a new dolphin pal and a human friend, the mermaids come up with a plan to rid the lagoon of plastic junk for good.