There are 3 books in the Babysitter's Guide to Monsters series.
The Babysitter's Guide to Monsters series does not have a new book coming out soon. The latest book, Mission to Monster Island (Book 3), was published in July 2019.
The first book in the Babysitter's Guide to Monsters series, A Babysitter's Guide to Monster Hunting, was published in June 2017.
The Babysitter's Guide to Monsters series primarily falls into the General Fiction genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.