Thirteen Reasons Why tells the story of thirteen people who influenced high schooler Hannah Baker to commit suicide. Told from the point of view of her classmate Clay, who is slowly listening to seven cassette tapes on which Hannah has recorded her story, the novel is a suspenseful revelation of the many forces that combined to demoralize Hannah.
Mom, I'm really worried about something. I know that information that could lead to people getting hurt.
Clay needs to tell an adult at least some of what he heard. Hannah's tapes revealed a number of people (like Bryce and Tyler) who had harmed others and might continue to do so if they are not stopped.