That George Wilkins was Shakespeare's collaborator on Pericles is a conjecture turned fact in Shakespeare Studies. Although Emma Smith does not challenge that attribution, her lecture explores the wider cultural and interpretative work the standard division of labour between the playwrights undertakes. It explores the ways in which modern attribution methods share some surprising territory with earlier scepticism about Shakespeare's authorship of the plays. The second part of the volume discusses the materiality of books over a long history, from Gutenberg's Bibles to Marilyn Monroe's picture reading Ulysses.