The Paranormalists series does not have a new book coming out soon. The latest book, The Bridge of Death (Book 4), was published in October 2012.
The first book in the Paranormalists series, The Haunting of Apartment 101, was published in October 2012.
The Paranormalists series primarily falls into the Paranormal Mystery genre. This young adult series was written for ages 12-17, but can be enjoyed by adults too.