The Forgotten Worlds series does not have a new book coming out soon. The latest book, The Necropolis (Book 3), was published in October 2010.
The first book in the Forgotten Worlds series, The Emerald Tablet, was published in October 2008.
The Forgotten Worlds series primarily falls into the Science Fiction / Fantasy genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.