The Nightmares! series does not have a new book coming out soon. The latest book, Nightmares! the Lost Lullaby (Book 3), was published in September 2016.
The first book in the Nightmares! series, Nightmares!, was published in September 2014.
The Nightmares! series primarily falls into the Action Adventure and Fantasy genres. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.