There are 3 books in the Diary of Dorkius Maximus series.
The Diary of Dorkius Maximus series does not have a new book coming out soon. The latest book, Diary of Dorkius Maximus in Pompeii (Book 3), was published in February 2015.
The first book in the Diary of Dorkius Maximus series, Diary of Dorkius Maximus, was published in September 2014.
The Diary of Dorkius Maximus 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.