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Since his debut as a poet, Paul Auster has pursued his metaphysical investigations in a semiotic world where signs are everywhere to be read, where doubts about authenticity and forgery are ubiquitous. In The Brooklyn Follies (2005), the multiplicity of originals and facsimiles, the silence/speech duality and the architectural metaphors lead to the final vision of the attacks on the World Trade Center. As the reminiscences of the confusio linguarum contribute to the novel’s plot, Paul Auster represents 9/11 ‘obliquely’ and reaffirms the role of language and the imagination in the rebuilding of truth.