I Know This Much Is True
By Wally Lamb

The novel tells the story of identical twins one whom is schizophrenic. At first you think it's going to be mostly about the brother with the disorder, but Lamb puts the "normal" sibling under a microscope. A lot of us know someone who has an albatross around his neck, and Lamb shows that often the people closest to the patients step into weird roles, like "I'm a caretaker, that's what I do," and they carry those identities throughout their lives. No one ever says, "Yeah, but who are you?" The main character has to bust open everything he thinks is true to come up with an answer to that.