This Is Where It Ends by Marieke Nikjamp

 This Is Where It Ends by Marieke Nikjamp , 285 pages

Another monotonous assembly at Opportunity High ends. But as the teachers and student body attempt to leave the auditorium, they find that all the doors are locked. 

Then, the bullets start flying.

Told through the point of view of different students, This Is Where It Ends winds a tragic tale of loss, hope, assault, love, and pain.