The Wilma Tenderfoot series does not have a new book coming out soon. The latest book, The Case of the Fatal Phantom (Book 3), was published in June 2012.
The first book in the Wilma Tenderfoot series, The Case of the Frozen Hearts, was published in September 2011.
The Wilma Tenderfoot series primarily falls into the Mystery genre. This chapter book series was written for ages 7-10, but some older readers may still like to read these books.