Fall of Night by Rachel Caine

Thanks to its unique mix of human and vampire residents, Morganville is a small college town with big-time problems. But it isn’t the only town with vampire trouble. Claire never thought she’d leave Morganville, but when she gets accepted into the graduate course at MIT, she can’t pass up the opportunity. Saying goodbye to her friends, especially her boyfriend Shane, is bittersweet, and her new life at MIT is both scary and exciting. Enrolled in a special advanced study programme Claire is able to work on VLAD, her machine designed to cancel the mental abilities of vampires. But Morganville and its inhabitants are never really far from Claire’s mind. When she begins testing her machine on live subjects, things quickly spiral out of control, and Claire begins to wonder whether leaving Morganville was the last mistake she’ll ever make . . .