Witch Heart (Leadership Always Requires Sacrifice): Gray Girl, Book 3 (Unabridged‪)‬

What doesn't kill you...can still cause a lot of damage. After a deadly accident in Airborne School, Jan Wishart returns to West Point under a cloud of suspicion. She is branded a "witch" by some at the military academy and creepy things keep happening in her room. She's losing the single most precious commodity available to cadets: sleep, which inflames her already heightened anxiety level.

Then, a masked intruder begins visiting her room at night. Or is she imagining that? Events escalate to the point of no return for Jan and her two best friends. When they swear an oath of loyalty to each other, they have no idea how much it will cost to fulfill that vow. Leadership always requires sacrifice. So does loyalty. And sometimes, one virtue must yield to the other.