It begins as an assignment for English class: Write a letter to a dead person. Laurel chooses Kurt Cobain because her sister, May, loved him. And he died young, just like May did. Soon, Laurel has a notebook full of letters to people like Janis Joplin, Amy Winehouse, Amelia Earhart, Heath Ledger, and more -- though she never gives a single one of them to her teacher. She writes about starting high school, navigating new friendships, falling in love for the first time, learning to live with her splintering family. And, finally, about the abuse she suffered while May was supposed to be...