How does Plinian intertextuality contribute to making a book unit distinctive from its fellows? Taking Book 6 as its subject, this chapter first looks at the depth of intertextual investment made by Pliny in the second Vesuvius letter (6.20), and looks at the challenge set by its apparent references to Petronius. It then looks at the persistent intertextual presence across Book 6 of Cicero, Catullus, Vergil, Quintilian and Tacitus, and argues for a coherent programme of engagement particularly with Vergil, Quintilian and the Dialogus of Tacitus. The chapter ends by reflecting on why Pliny appeared to have good reason in the early second-century CE to be confident about the vigour and life-expectancy of public oratory at Rome.