If you liked the show you'll like the book!
The book does not flip back and forth between past/"present" like show, but I actually really liked that. It also cuts some side character storylines to focus more on Charlotte from several POVs (Charlotte, George, Brimsley, and Agatha), but enough of each POV's storyline to keep their depth.
I cried at the end of the book just as much as I did at the end of the show ❤️ and now I'll go rewatch Queen Charlotte