This book had potential, but fell woefully short. 
 Jessica is a 'normal' (aren't they always?) seventeen year old girl until Lucius shows up and tells her that she's a vampire princess and he is her betrothed. At first she doesn't believe him and thinks he's a stuffy, pompous jerk, until we get further in and the story (mostly) falls into a pit of predictability. 
 Here's how it breaks down: Jessica wants to be normal and date Jake, not marry Lucius. Lucius relentlessly pursues her to no avail. He gives up JUST as she comes around, deciding that Jake is 'too nice' and she is madly in love with Lucius. But it's too late, because Lucius has called off their engagement and is dating Jessica's nemesis and torturer, Faith (of course). Lucius goes back to Romania and becomes Emo!Lucius, but Jessica follows and heals him with the power of TWU WUV. 
 The characters, I feel, are nothing special. Jessica is bland, Lucius is a jerk, Jake is the reason for the song Nice Guys Finish Last by Green Day, Faith and Frank are the stereotypical 'mean girl and mean boy'. I see Lucius change a bit after adapting to American culture, but all I see Jessica do is decide she can be the prettiest princess and have auditory hallucinations of her dead mother. I will say I hated the portrayal of Jake and how Jessica discards him for being 'too nice', instead choosing 'bad boy' Lucius. Not all guys who are nice have to be boring friendzone material and I hate the insinuation in so many books and other media that girls should choose the jerk over the nice guy because they're more interesting. 
 Vampires didn't seem necessary at all. Jessica and Lucius could have been Romanian royalty without the vampire aspect, in my opinion. 
 I didn't like Lucius' letters to his uncle between Jessica's chapters. If you want to show multiple characters' points of view, use third person. I will never harp on this enough. I enjoy reading and writing in first person, but only when I want to show just one specific character's point of view, otherwise I will use third person. (The only exception for me is during Vampire Academy with Rose and Lissa's spirit bond. For the most part it felt well done.) 
 I enjoyed the premise, but the execution leaves a lot to be desired.