This presentation will discuss using metadata of documents, such as title, genre, author, and publication date, to visualise and interpret literary transformation on the example of Polish Literary Bibliography. One of the major claims concerning Polish literary life is that after 1989 we witnessed its sudden de-centralisation and dispersion, followed, in the mid-1990s, by a subsequent re-centralisation of the capitalist book market. We may capture this evolution through basic statistics, i.e. the number of book publishers and the books they publish per year, or the number of literary journals. Maciej Maryl will discuss different ways of mapping this process through basic statistics and network analysis of literary worlds, based on bibliographical relationships.