The Germany and the Agricola of Tacitus
(Reklamlänk)
According to Wikipedia: "Publius (or Gaius) Cornelius Tacitus (AD 56 – AD 117) was a senator and a historian of the Roman Empire. The surviving portions of his two major works—the Annals and the Histories—examine the reigns of the Roman Emperors Tiberius, Claudius, Nero and those who reigned in the