Davies, Jason P. Rome’s Religious History: Livy, Tacitus, and Ammianus on Their Gods. New York: Cambridge University Press, 2004. Examines how Tacitus and the two other ancient writers depicted the role of religion in their accounts of Roman history.
Luce, T. J., and A. J. Woodman, eds. Tacitus and the Tacitean Tradition. Princeton, N.J.: Princeton University Press, 1993. Anthologizes important criticism by leading Tacitus scholars. Comments on the historian’s influence as well as his achievement.
Mellor, Ronald. Tacitus. London: Routledge & Kegan Paul, 1993. An essential work. Portrays Tacitus as a moralist and psychologist whose observations of imperial Rome are of permanent relevance. Discusses how the portraits of the various emperors reflect Tacitus’s biases and partialities.
Momigliano, Arnaldo. Essays in Ancient and Modern Historiography. Middletown, Conn.: Wesleyan University Press, 1977. An authoritative study that places Tacitus within the tradition of historiography.
O’Gorman, Ellen. Irony and Misreading in the “Annals” of Tacitus. New York: Cambridge University Press, 2000. Analyzes the language and style of Annals, placing the work within the context of Roman politics and theories of history in the first and second centuries c.e.
Paterculus, Velleius. The Tiberian Narrative, 2.94-131. Edited by A. J. Woodman. New York: Cambridge University Press, 1977. Comprehensive treatment of the portrait of Tiberius. Stresses the measure of qualified admiration within Tacitus’s general contempt for the emperor.
Santoro L’Hoir, Francesca. Tragedy, Rhetoric, and the Historiography of Tacitus’ “Annales.” Ann Arbor: University of Michigan Press, 2006. Examines how Tacitus’s historical work incorporated the themes, vocabulary, and poetic imagery of Attic and Roman tragedy.
Syme, Ronald. Tacitus. Oxford, England: Clarendon Press, 1958. Still an excellent sourcebook for the general reader. The most ambitious attempt to correlate Tacitus’s history with documentary evidence on ancient Rome.