Secret Keepers by Teddie Peacock:
 
Kelly Ryan was bad, very bad and they all knew it!
But they were friends with him anyway. Kelly was a walking, talking chaos creator.

Years later, when Kelly dies suddenly under mysterious circumstances; Tessa can't let it go. Not after the night that caused so much destruction, shattered friendships and changed all of them, forever.

They've all been telling lies and keeping secrets about that night and nearly everything else. They all had reasons to end Kelly but who wanted revenge enough to actually do it? Can Tessa stop the cycle of destruction that comes from being in Kelly's orbit? Lies, secrets, loyalty, revenge and murder- how far would they really go?