There are 3 books in The Door Within Trilogy series.
The Door Within Trilogy series does not have a new book coming out soon. The latest book, The Final Storm (Book 3), was published in September 2006.
The first book in The Door Within Trilogy series, The Door Within, was published in January 2005.
The Door Within Trilogy series primarily falls into the Christian Fantasy genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.