October — Andy Lockwood

Heartbroken by the loss of his best friend and love of his life, Tobin's mind battles between shutting down completely or going wild with rage. Unable to do anything but watch, Nova and Ember are left with struggling to find a way to stop Tris before she kills Tobin - or before he kills himself trying to exact his revenge. With precious time running out, Nova discovers a hidden ability that might help them all... Can she put it to use before Tobin completes his suicide mission? This is the tenth installment in a 12-part serial thriller.