Theory is not something I find congenial at the best of times, and when it is written in what seems to be deliberately opaque and clotted prose, I am even less of a fan. At several points in this book I paused, tempted to note a passage to quote in my review as an example of its unreadability, but I never did. I do recall one fairly minor instance from later in the book, in which Groensteen describes the pattern of a sequence as a "senestro-descendent diagonal"--or, in other words, downward to the left. As an academic, I find such language alienating, so I can only imagine how opaque the general reader would find this. Hell, the entire book is Groensteen defining what he calls arthrology, itself what seems to me to be a deliberately opaque term for what he means ... which is basically that panels on a page and across multiple pages engage complexly with each other. The idea itself is insightful and valuable, and when Groensteen turns to particular comics examples and analyzes them, the results are superb, but they are too few. Indeed, he frequently references pages he does not reproduce. In one instance he notes that he was denied permission to reproduce the pages--permission which he did not in fact need, as fair use allows the quoting of short image sequences as part of an analysis. Perhaps the publisher of the original French edition required permissions, but I have worked with the publisher of the translation and have been able to reproduce images without getting permission from publishers. Given the opacity of his language, Groensteen would have served his readers much better with more profuse use of examples of what he's talking about. If you're seriously interested in comics theory, this is probably a must-read, but this is not a book for the general reader, and if I am an indication of at least a segment of the academic audience, at least some academic readers will need to gird their loins for a deep wade through thickets of jargon to get to the core. 2.5 stars, if that were an available rating.