There are 5 books in the Call of the Ocean series.
The Call of the Ocean series does not have a new book coming out soon. The latest book, Holiday Waters (Book 5), was published in November 2018.
The first book in the Call of the Ocean series, Mermaid Waters, was published in June 2018.
The Call of the Ocean series primarily falls into the General Fiction genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.