Diverting Authorities examines literary experimentation in the fifteenth and sixteenth centuries. It looks at marginal annotations or 'glosses' provided by authors in a wide range of texts and argues that they provide important evidence for evolving ideas of authorship and literary authority. Through investigating what diverting glosses reveal about the wider establishment of identifiable conventions during the first century or so of printing, Griffiths makes a valuable contribution to the study of medieval and Renaissance paratexts.