The second book in the Divergent series:
"I have done bad things. I can't take them back, and they are part of who I am."
Tris will never be the same after suffering a heinous attack on her family. Wracked with grief and guilt, she must make decisions that go against everything she's ever stood for. What price is too high to pay for her to survive in this new, dangerous future she finds herself thrust into?
Veronica Roth - Insurgent