I'd do nothing but reading if I could (ok, maybe eat some great food, buy some fancy shoes between two books...oh, and spend some quality time with the gorgeous guy I married while I am on reading-break anyway...)
I couldn't get into it.
I didn't sympathize with Sophia or Wilhelm.
They were both too much.
Too beautiful. Too talented. Too sophisticated. Too tortured.
Her father and husband so bad - putting all Disney-villains to shame.
I felt that the plot was more or less all over the place.
For him it was more or less love/attraction at first sight. So no big suspense there.
Also it felt off as a historical. I never felt a certain "this place, this time".
For example: no gentleman would have a housemaid who is supposedly his mistress teach his sisters as a governess. Just not done.
And there is no understandable reason why she has to pretend to be his mistress for protection.
It would have been much smarter to stay hidden as a housemaid than draw so much attention to her person. Especially since she is more beautiful than the moon and the stars combined...
So I felt detached all the time reading.