The Fablehaven series does not have a new book coming out soon. The latest book, Keys to the Demon Prison (Book 5), was published in April 2010.
The first book in the Fablehaven series, Fablehaven, was published in August 2006.
The Fablehaven series primarily falls into the Fantasy genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.