This study analyzes "City of Glass," a postmodernist detective novella (or anti-detective) of the "New York Trilogy" by Paul Auster in terms of postmodernist elements and techniques such as metafiction, parody, intertextuality, irony and like. In doing so, some information about Auster's life and the plot of the work are also offered to the reader to make the analysis more concrete. Last but not least, this study is also thought to be useful for students enrolled in English Language and Literary Departments for them to understand the movement of postmodernism.