This book has an interesting premise, it is just not terribly well executed. This novel would have worked much better as a contemporary novel, especially as the author had the dialogue veering between blatantly modern speech peppered with the occasional use of the phrase `tis' as a partial nod to the historical setting. The author also goes from one character's first person perspective to another's without warning.
As a female doctor during the 1800's Serina would have encountered prejudice; not to mention surprise over her gender and profession. Instead everyone takes everything at face value, even the man servant who brings Lucien and his sister Raven to Serina, and has witnessed their fatal injuries and doesn't find it strange that when he sees them again mere hours later, they have not only survived, but are not even bedridden. This makes a nonsense of Serina's worries that someone might witness her psychic ability, and have her executed as a witch.
The over use of humor is the novel just breaks the tension of what is also a vampire novel. What could have been an entertaining novel was ruined by the many poorly thought out aspects of the plot; such as having a doctor who routinely works in a mortuary vomit at the gory state of injured patients.