There are 4 books in the Secrets and Spies series.
The Secrets and Spies series does not have a new book coming out soon. The latest book, New World (Book 4), was published in August 2014.
The first book in the Secrets and Spies series, Treason, was published in January 2014.
The Secrets and Spies 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.