There are 3 books in the Dragons of Earth, Water, Fire, and Air series.
The Dragons of Earth, Water, Fire, and Air series does not have a new book coming out soon. The latest book, Dragons of Wind and Waves (Book 3), was published in September 2018.
The first book in the Dragons of Earth, Water, Fire, and Air series, Dragons of Frost and Fire, was published in June 2015.
The Dragons of Earth, Water, Fire, and Air series primarily falls into the Fantasy genre.