There are 4 books in the Bolivia, Derek, and Rory series.
The Bolivia, Derek, and Rory series does not have a new book coming out soon. The latest book, The Down and Up Fall (Book 4), was published in June 1996.
The first book in the Bolivia, Derek, and Rory series, The Hot and Cold Summer, was published in April 1984.
The Bolivia, Derek, and Rory 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.