The Mister Max series does not have a new book coming out soon. The latest book, The Book of Kings (Book 3), was published in September 2015.
The first book in the Mister Max series, The Book of Lost Things, was published in September 2013.
The Mister Max series primarily falls into the Mystery genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.