The Pony Camp series does not have a new book coming out soon. The latest book, Maxine's Blue Ribbon (Book 3), was published in December 1994.
The first book in the Pony Camp series, Jessie Takes the Reins, was published in April 1994.
The Pony Camp 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.