We know our celebrities. We watch them onscreen. We follow them online. We know what they eat for lunch, we know the names of their pets, we know for whom they're voting. We know them. Or at least, we know their public personas, their brands. Designing a book cover for a title written by a celebrity involves not only the usual herculean task of transforming a complex universe — that of the book — into a single powerful image, but also grappling with a person readers think they already know.