The ScreamMates series does not have a new book coming out soon. The latest book, Field of Screams (Book 4), was published in June 1998.
The first book in the ScreamMates series, Haunted Cleats, was published in November 1997.
The ScreamMates series primarily falls into the Horror genre. This middle grade series was written for ages 8-12, but can be enjoyed by older readers as well.