During works on the reconstruction of the book collection from the Jesuit College in Poznań the researchers came across three volumes with characteristic Flemish Panel-Stamped decorated bindings, in which designs were stamped into the leather cover by a block, into which the image had been carved or incised. The bindings were made in Leuven, in bookbinding workshops that placed their monograms of the following letter combinations: “IP” (Jacob Pandelaert?) and “IB” (Jacob Bathen). Two of the volumes are now kept in the University Library in Uppsala, while one of them is held in Poznań University Library. These are bookbinding blocks that in total include 11 works. The present article presents the history of the three volumes. Following an analysis of the numerous marginal notes included in the volumes it was possible to establish that that the first owner of the volumes had been the writer, humanist and reformer Andrzej Frycz Modrzewski (ca. 1503–1572). Modrzewski had most probably purchased the volumes in Leuven in September 1549. Subsequently, the books were taken over by Stanisław Karnkowski (1520–1603), who donated them to Poznań-based Jesuits. This article contributes to the knowledge on the private book collection of Modrzewski. A particular attention should be given to the editions of the works of Piotr Ramus (Pierre de la Ramée) and Joachim Perion, specifically collected for a purpose by Modrzewski. ; W trakcie prac nad rekonstrukcją księgozbioru kolegium jezuitów w Poznaniu uwagę zwróciły trzy woluminy w charakterystycznych flamandzkich oprawach plakietowych. Oprawy wykonano w Leuven, w warsztatach introligatorskich monogramistów „IP” (Jacob Pandelaert?) oraz „IB” (Jacob Bathen). Dwa woluminy znajdują się obecnie w Bibliotece Uniwersyteckiej w Uppsali, a jeden w Bibliotece Uniwersyteckiej w Poznaniu. To klocki introligatorskie zawierające łącznie 11 dzieł. W artykule opisano historię tych trzech woluminów. Dzięki analizie licznych not marginalnych ustalono, że pierwszym właścicielem ksiąg był pisarz, ...