This is Where it Ends by Marieke Nijamp

To say this book was intense would be an understatement.  From the get go, you are thrust into this school as tragedy is unfolding.  It was difficult to read at times, as there is much bloodshed.  Each of the four narrators has some connection to the shooter and you are able to get a unique perspective from all of them.  It is tragic, but it is also a story of family and heroism.  As long as these types of things are happening in our world, we need books like these that help us to explain the senselessness and the emotion of these terrible events.

From Amazon:

Everyone has a reason to fear the boy with the gun.

10:00 a.m.
The principal of Opportunity, Alabama's high school finishes her speech, welcoming the entire student body to a new semester and encouraging them to excel and achieve.

10:02 a.m.
The students get up to leave the auditorium for their next class.

10:03
The auditorium doors won't open.

10:05
Someone starts shooting.

Told from four perspectives over the span of 54 harrowing minutes, terror reigns as one student's calculated revenge turns into the ultimate game of survival.

Winter '15 Kids Indie Next List
Goodreads YA Best Books of the Month
Buzzfeed 5 YA Books You Should Be Reading This January
Bustle.com 18 of 2016's Most-Anticipated YA Novels
BookRiot 15 Books out in 2016 You Should Mark Down Now