Kagan, Donald. The Peloponnesian War. New York: Penguin Books, 2004.
Featured
The Landmark Thucydides: A Comprehensive Guide to the Peloponnesian War
Strassler, R., ed. The Landmark Thucydides: A Comprehensive Guide to the Peloponnesian War. Translated by E. Crawley. Introduction by V. D. Hanson. New York: Free Press, 1998.
The Humanity of Thucydides by Clifford Orwin
Orwin, Clifford. The Humanity of Thucydides. Princeton, NJ: Princeton University Press, 1994.
The Ambition to Rule: Alcibiades and the Politics of Imperialism in Thucydides by Steven Forde
Forde, Steven. The Ambition to Rule: Alcibiades and the Politics of Imperialism in Thucydides. Ithaca: Cornell University Press, 1989.
“Justifying Empire” by Clifford Orwin
Orwin, Clifford, “Justifying Empire: The Speech of the Athenians at Sparta and the Problem of Justice in Thucydides,” The Journal of Politics, vol. 48, no. 1, 72-85, 1986.
The City and Man by Leo Strauss
Strauss, Leo. “On Thucydides' War of the Peloponnesians and the Athenians.” In The City and Man, 50–85. Chicago: University of Chicago Press, 1978. Originally published 1964 by the University Press of Virginia.
History of the Peloponnesian War, Loeb Classical Library, Volumes I – VI
Thucydides. History of the Peloponnesian War. Vols. 1–4. Translated by C. F. Smith. Cambridge, MA: Loeb Classical Library, Harvard University Press, 1919.