No. As the book said, users must have read, write and delete permissions on that folder, which means any user who has permissions to access the database will also have permissions to copy the files in that folder. You could architect an app in the manner the book describes, but you're looking at a lot of work, and if you're going to do this, you'll be a lot better off moving to a true server database.
You can name the database with a non-standard name (like gwpdxg.ocx or something), and name the files and such something that would be non-ituitive. That's about as far as you can really go.