Jay-Z has a funny relationship with the written word. As a rapper, Jay famously never wrote anything down. Instead, he assembled entire verses in his head, going into his fabled rain-man state to fit all those interlocking pieces together. But writers have probably published millions of words about Jay, and Jay has published some words about himself, too. Thirteen years ago, Jay came out with Decoded, a book of his annotated lyrics. Now, Jay-Z has his own exhibition at the Brooklyn Public Library.