The book Deep Blue is written by Jennifer Donnelly. I really like this book because it is full of magical creatures. In the book, there are different languages that mean the same thing. The book is talking about the adventure of the mermaids. In this book, the main character is the mermaid named Serafina. She was supposedly engaged to Prince Madhi. But when she heard that over the two years, Madhi had changed a lot. He had become a playboy and even had a girlfriend. When Serafina first heard this, she was very sad. But her best friend, Neela, cousin of Madhi, cheered her up. When the day to announce Serafina as the new queen, an attack appeared and maybe had killed Serafina's mother. Since that day, Serafina and Neela had been going through different difficulties and getting into several problems. Serafina and Neela met different mermaids from different places. Each one of them had to leave their home and family to save the ocean. The thing that I like about this book is that the characters in the story have great confidence even though they were at their worst times. I think the story is very heart-warming and exciting at the same time. I would really recommend this book to people that like to read or watch action books or movies because there is a lot of different adventures in this book that are super surprisingly fun and dangerous.