The History of Herodotus - Book 7: Polymnia (Unabridged‪)‬

One of the masterpieces of classical literature, the "Histories" describes how a small and quarrelsome band of Greek city states united to repel the might of the Persian empire. But while this epic struggle forms the core of his work, Herodotus' natural curiosity frequently gives rise to colorful digressions - a description of the natural wonders of Egypt; an account of European lake-dwellers; and far-fetched accounts of dog-headed men and gold-digging ants. With its kaleidoscopic blend of fact and legend, the "Histories" offers a compelling Greek view of the world of the fifth century BC.
BOOK 7: POLYMNIA: Now when tidings of the battle that had been fought at Marathon reached the ears of King Darius, the son of Hystaspes, his anger against the Athenians, which had been already roused by their attack upon Sardis, waxed still fiercer, and he became more than ever eager to lead an army against Greece.