All 18-year-old Briar Greyson wanted was to figure out this whole living-away-from-your-parents thing. Apartment, steady job, cool roommate? Check. Noah, her adorable (albeit elusive) boyfriend? Check. Everything in the life of Briar was pretty good.Then she and her roommate are attacked on their way home one night. Briar wasn't supposed to survive.Instead, according to the two guys who saved her, she's turning into the things that attacked her: a...