This paper concerns the book production and dissemination in the Patriarchy of Aquileia in the 9th century, as reflected from the few surviving manuscripts, from the textual tradition of liturgical and theological works and from indirect evidence as authors' sources and library inventories. Manuscripts of the second half of the 9th century that can be on textual grounds ascribed to Friuli display common palaeographical features, to which the influence of transalpine styles does not seem to be alien. Though bitty, the research results highlight strong relationships between Friuli and transalpine lands in the 9th century.