There are 2 books in the Joey and Johnny, the Ninjas series.
The Joey and Johnny, the Ninjas series does not have a new book coming out soon. The latest book, Epic Fail (Book 2), was published in April 2016.
The first book in the Joey and Johnny, the Ninjas series, Get Mooned, was published in April 2015.
The Joey and Johnny, the Ninjas series primarily falls into the Graphic Novel genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.