We Need to Talk About Kevin (2006)

Shortly before his sixteenth birthday, Kevin Khatchadourian kills seven of his fellow high-school students, a cafeteria worker and a teacher. He is visited in prison by his mother, Eva, who narrates in a series of letters to her estranged husband, Franklin, the story of Kevin's upbringing. For this powerful, shocking novel, Lionel Shriver was awarded the Orange Prize for Fiction.

~from the back cover