The merfriends are working together on a school project about types of coral in the different ocean zones. The decide to do some research in the Midnight Realm in the depths of the ocean that cannot be reached by any sunlight. First, they will have to prepare some lanterns, food, a map, and a special way for their mammal pets to dive so deep without needing to come up for oxygen. They know it is incredibly dangerous, but the friends are resourceful and brave! When they encounter a deadly giant squid, it will take all their courage to make it out alive!

I loved this cute book! The mermaid culture is wonderfully imaginative, and I thought it was so fun to learn about all the mermaid friends. We also get some real life facts about interesting fish and conservation in the ocean. The plot and mysterious adventure had me guessing and wondering!

I love all the interesting mermaid characters. They all have their own strengths and that is what makes them such a great team. Coralie is funny and smart and strong. Naya is always inventing some type of new scientific magical combination to help them in their adventures. Luna has a special connection to marine animals. Kai is always looking for a new way to do things, a new approach to their problems. And Marina is the heart of the group, and she is always encouraging and supporting the others.

The black and white illustrations in this book are so cool! It really brings the story to life. I love the art style, and the unique designs for each mermaid character.

Disclaimer: I received a copy of this book from the publisher in exchange for a free and honest review. All the opinions stated here are my own true thoughts, and are not influenced by anyone.