Honzuki no Gekokujou: Shisho ni Naru Tame ni wa Shudan wo Erandeiraremasen Dai 3-bu - Ryouchi ni Hon wo Hirogeyou!

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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)