This novel is a dramatization of the Countess Erzsébet Báthory who is also known has the "Blood Countess" . I'm not sure how much of it is based on fact and how much artistic license was taken. However, the narrative, told from Erzsébet's perspective was interesting and decently told while lulling you into almost seeing the rational behind the insanity -- that is if you are to believe that she was a victim of politics though she was definitely a sadistic woman.
I couldn't give it a 3 star rating. It's a personal preference in which I like a fuller developed story rather than the superficial narrative style. It's okay. I recommend this novel for someone that wouldn't mind a casual re-imagining from the Countess's perspective.