Glass houses by Rachel Caine. Tha Morganville vampires book one.
College freshman Claire Danvers has had enough of her nightmarish dorm situation, where the popular girls never let her forget just where she ranks in the school's social scene: somewhere less than zero. When Claire heads off-campus, the imposing old house where she finds a room may not be much better. Her new roommates don't show many signs of life, but they come out fighting when the town's deepest secrets come crawling out, hungry for fresh blood...
Although I didn't actually read Glass houses in the month of April I did start the latest in the series, Bite club and wanted to recommend them all so I thought it best to start at the beginning lol
White collar woman was suggested from the author himself and you can see his website here to find out how to get your hands on the book.