A volume in the British Film Institute's Classics series, this short book deals with Fritz Lang's 1926 silent film Metropolis. There is some discussion of the origins of the film, and an interesting summary of some of the sources of the plot and the imagery. Most of the book discusses the "reception history" of this controversial film, from contemporary reviews to the cult-film remake by Morodor.
Generally, most critics were impressed by the technical aspects of the film, but considered the story to be silly; the Communists considered it proto-Nazi and the Nazi's as Communist propaganda. (Personally, I think it was most similar ideologically to H.G. Well's The Time Machine, in its "Fabian" argument that the capitalists should find a mediator with the workers before the workers are tempted to take things into their own hands and use violence against the capitalists. But Wells hated the film, because of its absurd science-fiction aspect -- the machines that don't seem to make anything, that are hard physically to operate, the city which goes up vertically instead of sprawling into the suburbs, in short, the symbolic aspects of the film.)
To complicate matters further, although this is an entirely symbolic film, which doesn't make a lot of sense at a realist level, the American distributor (Paramount) decided to cut the symbolism out, as well as the entire subplot relating Fredersen and Rotwang, and the (fairly realistic) part of Fredersen's spy Slim, and the later versions (even in Germany) were based on that American "cut" version, about 25% shorter than the original film, which was itself destroyed. Much of the recent history has been the attempts to "reconstruct" the original film from outtakes, promotional stills, reviews of the premier, the censor's cards for the dialogue, and the musical score with cues. The book ends with an interesting discussion of the 1984 Giorgio Morodor version (which, tinted and with a rock soundtrack, has been compared to a long music video) and other modern (post-modern) adaptations.
The book was written before the complete original version of the film was rediscovered in 2008 (something the author predicted would never happen), so the discussion of the film itself is out of date; it's surprising that BFI continues to reprint this (last reprinting 2011) rather than replacing it with a revised version based on the complete film.