The Crispin series does not have a new book coming out soon. The latest book, The End of Time (Book 3), was published in June 2010.
The first book in the Crispin series, Crispin: The Cross of Lead, was published in June 2002.
The Crispin series primarily falls into the Historical genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.