Vampire Academy 2 : Frostbite by Richelle Mead

It's winter break at St Vladimir's, and a massive Strigoi vampire attack has put the school on high alert. This year's trip away from the academy to the wintery peaks of Idaho has suddenly become mandatory. 

But Rose's troubles seem to follow her wherever she goes - dealing with the pain of knowing that her relationship with her tutor Dimitri can never be, things get even more complicated when one her closest friends admits his feelings for her. 

The glittering winter landscape may create the illusion of safety but Rose - and her heart - are in more danger than she ever could have imagined...