Editio decima
The Cyropaedia (or Cyropedia) is a partly fictional biography of Cyrus the Great, written in the early 4th century BC by the Athenian gentleman-soldier, and student of Socrates, Xenophon of Athens. The Latinized title Cyropaedia derives from Greek Kúrou paideía (Κύρου παιδεία), meaning "The Education of Cyrus". Aspects of it would become a model for medieval writers of the genre known as mirrors for princes. In turn it was a strong influence upon the most well-known but atypical of these, Machiavelli's The Prince, which was an important influence in the rejection of medieval political thinking, and the development of modern politics. However, unlike most "mirrors of princes", and like The Prince, whether or not the Cyropaedia was really intended to describe an ideal ruler is a subject of debate.
http://en.wikipedia.org/wiki/Cyropaedia
Xenophon ( c. 430 – 354 BC), also known as Xenophon of Athens, was a Greek historian, soldier, mercenary, and student of Socrates. He is known for writing about the history of his own times, the late 5th and early 4th centuries BC, especially for his account of the final years of the Peloponnesian War. His Hellenica, which recounts these times, is considered to be the continuation of Thucydides’ History of the Peloponnesian War. His youthful participation in the failed campaign of Cyrus the Younger to claim the Persian throne inspired him to write his most famous work, Anabasis.
http://en.wikipedia.org/wiki/Xenophon