This title by Johnathan Rosenbaum ostensibly covers the importance of film canons by using a collection of his essays from the Chicago Reader compiled in a manner to support this argument. If one were to judge the quality of this book on these standards, I would say this book fails. However, this book is teeming with insight and knowledge of cinema in a way that only Rosenbaum can provide.
The reading is sectioned off in five parts, classics, special problems, other canons, disputable contenders and filmmakers. For the committed reader, or one who has completely bought into the premise, it's very possible to weave together the argument from these sections, however vague it maybe, however what really stands out is his eagerness to draw attention to Films and Filmmakers that may not have gotten the attention that they have deserved. Such filmmakers would be Charles Brunett, Joris Ivens, Hou Hsia-hsien, Abbas Kiarostami, Edward Yang and many others. It's clear that he mentions these films by these filmmakers in order to illustrate the importance of film canonization. These are films that generally have a hard time making their way to states for one reason or another. (a problem he attributes mainly to studio interference, and media bias) Canonization protects these films from complete obscurity by grouping them with other films that may be more accessible to the average film lover.
He also covers more well known artists as Orson Welles, Fritz Lang, Stanley Kubrick, Alfred Hitchcock, Robert Bresson and many others, but it's done in a way that also ties in with the general theme of the book. He generally speaks on how they struggled to maintain the artistic integrity of their works, often in vain and what's produced to the audiences is a lot of times just a variation of what was originally intended. One can piece together from this that he may be suggesting under film canons that these blunders may also may be brought to light.
The reading starts off innocently enough, but it suffers, at least in my opinion of being overly informative. I would compare it to having a friend whose "too" knowledgeable on a given subject, and in his eagerness to explain it to anyone who will listen, he bombards you with the information that you're a kind enough friend to listen to. The positive behind that though, is its almost impossible to walk away without gaining some perspective yourself, even if some of it was lost.