The Half Upon a Time series does not have a new book coming out soon. The latest book, Once Upon the End (Book 3), was published in May 2013.
The first book in the Half Upon a Time series, Half Upon a Time, was published in September 2010.
The Half Upon a Time 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.