The study presents the research findings from a comparison of younger school-aged readers from 3 countries -- Slovakia, the Czech Republic and Poland. The research used a questionnaire of own design based on an initial exploration through focused interviews with readers. The research design was quantitative-qualitative in nature and those questions about preferred literary genres and literature content were semi-open. The research sample consisted of 693 Slovak, 254 Czech and 248 Polish younger-school readers. Respondents were divided according to reading levels into four groups. We searched for whether there were significant differences between the national groups. The research findings showed some similarities but also specific differences between national groups that were described in the research results. In the discussion, the authors present the importance of the research results in the context of pedagogical practice and undergraduate teacher preparation for students of primary education. [For the complete volume, "NORDSCI International Conference Proceedings (Online, October 11-13, 2021). Book 1. Volume 4," see ED625509.]