The Jellaby series does not have a new book coming out soon. The latest book, Jellaby: The Lost Monster (Book 3), was published in January 2014.
The first book in the Jellaby series, Jellaby, was published in February 2008.
The Jellaby 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.