There are 2 books in the Secrets of Topsea series.
The Secrets of Topsea series does not have a new book coming out soon. The latest book, The Extremely High Tide! (Book 2), was published in January 2019.
The first book in the Secrets of Topsea series, A Friendly Town That's Almost Always by the Ocean!, was published in April 2018.
The Secrets of Topsea series primarily falls into the General Fiction genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.