There are 2 books in the Blue Planets World series.
The Blue Planets World series does not have a new book coming out soon. The latest book, Sirens (Book 2), was published in October 2017.
The first book in the Blue Planets World series, Sleepers, was published in July 2017.
The Blue Planets World series primarily falls into the Action Adventure genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.