F. M. Cornford 
Thucydides Mythistoricus (Routledge Revivals) [PDF ebook] 

First published in 1907 and reissued in 1965, this is a fascinating study of Thucydides’s History. Thucydides set out to write a truthful account of the Pelopennesian war, but his work reflects his Athenian fourth-century B.C. context, which was of a particular interest to Cornford. In this fascinating title, Cornford analyses the causes of the war as shown by Thucydides and other sources, and then goes on to comment on the History.