2016’s Adopted Daughter of an Archduke, Volume 1 is the first instalment of the third arc in Miya Kazuki’s Ascendance of a Bookworm secondary-universe fantasy series. Illustrations are by You Shiina. The 2020 English translation is by Quof.
Myne is dead! Long live Rozemyne, recently acknowledged daughter of Karstedt, knight commander. Her very existence has been hidden for years to protect her from the nobility’s incessant squabbles; now Rozemyne will now be formally adopted by Sylvester, Archduke of Ehrenfest.
That’s the official story.