Interest LevelReading LevelReading A-ZATOSWord Count
Grades 4 - 8Grade 5n/a4.766003
Serafina, Neela, Ling, Ava, Becca, and Astrid, six mermaids from realms scattered throughout the seas and freshwaters, were summoned by the leader of the river witches to learn an incredible truth: the mermaids are direct descendants of the Six Who Ruled-powerful mages who once governed the lost empire of Atlantis. The ancient evil that destroyed Atlantis is stirring again, and only the mermaids can defeat it. To do so, they need to find magical talismans that belonged to the Six.

Serafina believes her talisman was buried with an old shipwreck. While researching its location, she is almost discovered by a death rider patrol led by someone familiar. . . . The pain of seeing him turned traitor is devastating.

Neela travels to Matali to warn her parents of the grave threat facing their world. But they find her story outlandish; a sign that she needs to be confined to her chamber for rest and recovery. She escapes and travels to Kandina, where her talisman is in the possession of fearsome razormouth dragons.

As they hunt for their talismans, both Serafina and Neela find reserves of courage and cunning they didn't know they possessed. They face down danger and death, only to endure a game-changing betrayal, as shocking as a rogue wave.
Hardcover, 320 pages
Published on January 6, 2015 by Disney-Hyperion
ISBN-10: 1423182006
ISBN-13: 9781423182009
10 Book Reviews
  • kaate
    kaateabout 6 years55 stars
    The second book is great too... I love reading books about things like this... I really hope that Mermaids and Mermens are real. And I believe that they are real!
    • nenestar30
      nenestar30almost 7 years55 stars
      This is best book ever. I know that mermaids aren't real but this book makes it so realistic!
      • neela
        neelaabout 7 years
        this is such a good BOOK!!!!!!!!!!!!!!!!!!!!!!!!! I LUV IT
        • 00016697
          00016697about 7 years55 stars
          Such a good book!! It has suspicious mystery, daring adventure, sappy romance, and tragic endings!!
          • GracieGrace over 7 years
            This is like, the BEST book ever! I am a huge merfan, and I just love this series.
            • codanikko
              codanikkoover 7 years55 stars
              Such a great book I finished it in 2 days! recommend you read it
              • gymnast19
                gymnast19over 7 years55 stars
                A non-fiction action packed adventure with a young girl realizing that all her ancestors fought and ruled with love this book tells how she finds herself.I cant wait till this becomes a movie.
                • dreambigalways
                  dreambigalwaysover 7 years55 stars
                  book is great. got from book fair last week. finished it. is a very good book and it makes sense even if you haven't read Deep Blue
                  • Shayover 7 years
                    It's a fun book
                    • amazingdancer22
                      amazingdancer22over 7 years55 stars
                      This book is a sequel to Deep Blue. It's also about mermaids. I beg you people, to read both books. They get a little scary, but they are awesome.