This paper investigates the literature published in Croatia, where the primary and secondary emphasis is on LGBT+ topics and deals with the study of how LGBT+ literature was published in the last 10 years (2011 – 2020.) marked and presented in the online catalogs of 20 central public libraries in Republic of Croatia. The aim of the paper is to investigate how the topics are presented (in terms of content with the help of UDC, subject headings, keywords). The research corpus was collected with the help of the Croatian National Bibliography - Series A. The analysis of the representation and subject processing of material on LGBT+ topics is not represented in a large number of works, and in this sense it can potentially serve as a source of information for new research in this area. The research was carried out in three phases: the first phase involved the compilation of a research corpus with the help of the Croatian National Bibliography - Series A using a predefined list of terms which ultimately created a research corpus of 139 titles, the second phase of the research involved using the research corpus to search 20 online catalog of central public libraries in Croatia, and for each library an individual list of titles that were found and the number of copies that the library owns was compiled, the third phase of the research included the analysis of subject terms and keywords assigned to the titles found according to pre-agreed criteria.