
A partially fictionalized biography of Cyrus the Great, written by the Athenian gentleman-soldier Xenophon, exploring the education and leadership of the ideal ruler.
And of course Caesar had read this book Zenapon Cyropidia.
"
"The transcript explicitly mentions the book 'Zenapon Cyropidia' (Xenophon's Cyropaedia) and notes that Julius Caesar had read it."