Oh, this book. Everyone should read it. It's simple: about a family of step children, siblings, step parents and parents. And it's complicated: how children can change when they become adults, how something you did as a child can have a profound and everlasting impact. There's tragedy, but the book shows how the characters live through it, and there's things done wrong, and the book shows how we can survive that too. Forgiveness, love, just human life.
And it is beautifully written. Reading it is not like reading at all; it's like being there.
Go and read this.