The Field of Swords (Emperor #3) by Conn Iggulden - Used

The time has come for Julius Caesar to enter the political battleground that has become Rome. Having proved his valor in the slaves’ revolt, Caesar is strengthened by the love of a beautiful older woman—and by the sword of his loyal friend Marcus Brutus. Crushing a rebellion, bringing order to the teeming city, Caesar then makes the move that will change history: He leaves Rome for the foothills of the Alps. And with an army made in his own image, he begins a daring charge through Gaul, across the English Channel, and to the wilds of tribal Britain.

All the while his political adversaries in Rome grow ever more powerful. So that when the fighting is over, Julius will face the greatest threat to him yet—a man who wants Rome for himself.

Emperor: The Field of Swords captures in riveting detail a world being shaped by a brilliant civilization. And in this extraordinary historical novel, the fate of Rome is being driven by the ambitions of a single man with an unmatched genius for power.