In this study, it was aimed to determine the level of the peritextual features of Feridun Oral's children's books, the readability of the texts, what the subject and main ideas are. The research was designed according to the holistic multi-case pattern of the qualitative methods. 13 storybooks from the works of Feridun Oral were used as data sources. Document analysis method was used to collect data in the study. Both descriptive analysis and thematic content analysis were used in the analysis of the data obtained in the study. As a result of the analysis, although it was seen that all of the books, which are data sources, got close and high scores in terms of peritextual features, it was revealed that the author reflected certain practices in all his books in terms of design features. When the average level of readability of all the books considered within the scope of the research was examined, it was seen that the books are generally easy. When the data sources were examined in terms of the codes they contain, it included instilling the values of "responsibility, determination, respect, inclusiveness, solidarity, social aid, love of animals, protection of nature and living things" to the reader.