The Olivia Sharp series does not have a new book coming out soon. The latest book, The Green Toenails Gang (Book 4), was published in June 1991.
The first book in the Olivia Sharp series, The Pizza Monster, was published in May 1989.
The Olivia Sharp series primarily falls into the General Fiction genre. This chapter book series was written for ages 7-10, but some older readers may still like to read these books.