An overall enjoyable read. Lissa, interestingly, isn't featured as much, though we get to delve more into Rose's relationships with her mother, Janine; her mentor/love interest, Dimitri; her best friend/love interest, Mason; and newcomer moroi royal Adrian Ivashkov. 
 I thought Rose's POV was much stronger in "Frostbite" than in "Vampire Academy." We get to see the changes wrought from her ordeal in the first book, as she continues to struggle to control her temper and impetuousness while still behaving like a believable 17-year-old. While the guardian-moroi relationship was introduced in the first book, we see more of the nuances involved in that relationship, like how much dhampirs sacrifice in order to protect their moroi charges. We also get a bigger glimpse into moroi politics as Lissa smoothly maneuvers her way through complex and controversial issues facing the moroi in the wake of the Strigoi attacks; it's obvious that these political issues are going to become crucial in the series, as the age-old argument between maintaining tradition and evoking change. 
 The crux of the plot revolves around recent Strigoi attacks on Moroi royal families as well as St. Vladimir's post-Christmas vacation at a ski resort, though of course in the end, Rose (accompanied by Lissa's boyfriend, Christian) races off to confront danger and adventure - though surprisingly not for the reason you would anticipate with Rose.