"I don't think anyone has written a great graphic novel"

This quote by Ted Rall suggests that he believes that nobody has actually yet written an excellent graphic book. This might be translated in a couple of different ways. First of all, it might imply that he believes that no one has actually yet written a graphic book that is truly excellent, and that there is still room for improvement in the category. Additionally, it could imply that he thinks that nobody has yet written a graphic book that is as fantastic as other works of literature, such as novels or plays. It could also mean that he believes that nobody has yet composed a graphic book that is as terrific as other graphic novels, such as comic books. Whatever the interpretation, it is clear that Ted Rall thinks that there is still space for enhancement in the category of graphic books.