The Reckoning by Caroline Peckham

The answer to your question will be revealed on the Lunar Eclipse.
But when finding the truth, don’t let the shadows take you.
The week of The Reckoning has begun. And senior students have been tasked with making the freshmen’s lives pure hell as they prepare to take their fateful assessment.
With the Lunar Eclipse on the horizon, Tory and Darcy have more to worry about than just passing their exams. A dark plot is unfolding and the shadows are drawing closer…