There are several ways to trace the development of science – to analyze the theory and methods, institutions and publications as an expression of scientific work, and last but not least - the scientists. Article tries to describe representatives of modern Polish book science. As a source of data Supplement IV of Dictionary of Polish Book Specialists [Slownik pracownikow ksiązki polskiej. Suplement IV] , published in 2016, was selected. Biographies were analyzed for common characteristics, such as education, employment, participation in associations. Starting date of analysis was 1945, giving a total of 263 records. The study used quantitative analysis and a method of social network analysis (SNA).