Book excerpt: This is the OCR-endorsed publication from Bloomsbury for the Latin AS and A-Level (Group 1) prescription of Tacitus' Annals IV, sections 1–4 (... non adversus habebatur), 7–12, and 39–41, and the A-Level (Group 2) prescription of sections 52–54, 57–60, 67–71 and 74–75, giving full Latin text, commentary and vocabulary, with a detailed introduction that also covers the prescribed sections to be read in English for A Level. It is AD 23 and we are in the ninth year of the reign of Rome's second emperor, Tiberius. Increasingly he has come to rely on the assistance of the Praetorian Prefect, Lucius Aelius Sejanus, in the running of Rome. But Sejanus has ambitions beyond being a mere assistant, extending even as far as the imperial throne itself. Tacitus vividly portrays the machinations of Sejanus as he attempts to manoeuvre himself into a position to assume the ultimate authority, characterising the period as one dominated by villainy, betrayal and deceit. Resources are available on the Companion Website.