Ascendance of a Bookworm: I'll Do Anything to Become a Librarian! Part 3 - Let's Spread Books Through the Duchy!

To protect those she cares about from danger, Myne abandons the life she knows to become Rozemyne, the archduke's mana-rich adopted daughter. But her passion for books hasn't changed, nor does she hesitate to charge into another strange new world. In this biblio-fantasy by bookworms, for bookworms, the detailed setting continues to expand—and so too does the book-making industry!

(Source: J-Novel Club)