It's also good to know that unrelated content can sometimes be found under the same name. One example is a short, indie visual novel game from 2016 called "Jojo-a-GoGo." This is completely unrelated to Hirohiko Araki’s art book. It's a different project made for the NaNoRenO game jam, featuring original characters.
JoJo A-GoGo! English PDF: Exploring Hirohiko Araki’s Masterpiece Jojo A Gogo English Pdf