The Night Walker (Nightmare Hall) by Diane Hoh

High on a hillside overlooking Salem University, hidden in shadows and shrouded in silence, sits Nightingale Hall. Nightmare Hall, the students call it. Because that’s where the terror began.Quinn Hadley is sure she must be the only sleepwalker at Salem. It’s so embarrassing, especially since she never remembers where she was or what she was doing. But it’s never been a problem.Until now.Because someone is roaming the campus, attacking people in the middle of the night.No one knows who the crazed night stalker is.But all the clues point to Quinn.