The Aldo series does not have a new book coming out soon. The latest book, Aldo Peanut Butter (Book 6), was published in January 1990.
The first book in the Aldo series, Much Ado About Aldo, was published in August 1978.
The Aldo 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.