There are 3 books in the Endgame: The Training Diaries series.
The Endgame: The Training Diaries series does not have a new book coming out soon. The latest book, Existence (Book 3), was published in June 2015.
The first book in the Endgame: The Training Diaries series, Origins, was published in December 2014.
The Endgame: The Training Diaries series primarily falls into the Action Adventure genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.