The Monster School series does not have a new book coming out soon. The latest book, The Spooky Sleepover (Book 2), was published in June 2014.
The first book in the Monster School series, First Day Frights, was published in July 2012.
The Monster School series primarily falls into the General Fiction genre. This series was written for ages 5-7 and is a good choice for children just learning to read.