The Nocturnals series does not have a new book coming out soon. The latest book, The Hidden Kingdom (Book 6), was published in February 2018.
The first book in The Nocturnals series, The Mysterious Abductions, was published in April 2016.
The Nocturnals series primarily falls into the Fantasy genre. This chapter book series was written for ages 7-10, but some older readers may still like to read these books.