The Cay series does not have a new book coming out soon. The latest book, Timothy of the Cay (Book 2), was published in April 2007.
The first book in The Cay series, The Cay, was published in January 1969.
The Cay 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.