Kindle devices appeal to many people. When everything works, they're great. But Amazon is becoming more and more finicky, both in terms of supported formats and the freedom to manage your own books.

You can convert PDF files into Google Docs within your Drive, but the formatting may not be perfect.

Image formats like JPEG and PNG typically work just fine for casual use. However, when scalability matters, there's one particular file type that's better suited for such projects: AI files. An AI ...