The Dark Lord Mass market paperbound - 2003

Tom Harlan brings his Oath of Empire series to a shattering conclusion in" T""he Dark Lord. "
In what would be the 7th Century AD in our history, the Roman Empire still stands, supported by the twin pillars of the Legions and Thaumaturges of Rome. The Emperor of the West, the Augustus Galen Atreus, came to the aid of the Emperor of the East, the Avtokrator Heraclius, in his war with the Sassanad Emperor of Persia. But despite early victories, that war has not gone well, and now Rome is hard-pressed. Constantinople has fallen before the dark sorceries of the Lord Dahak and his legions of the living and dead. Now the new Emperor of Persia marches on Egypt, and if he takes that ancient nation, Rome will be starved and defeated.
But there is a faint glimmer of hope. The Emperor Galen's brother Maxian is a great sorcerer, perhaps the equal of Dahak, lord of the seven serpents. He is now firmly allied with his Imperial brother and Rome. And though they are caught tight in the Dark Lord's net of sorcery, Queen Zoe of Palmyra and Lord Mohammed have not relinquished their souls to evil.
Powerful, complex, engrossing --Thomas Harlan's Oath of Empire series has taken fantasy readers by storm. The first three volumes, "The Shadow of Ararat, The Gate of Fire, "and "The Storm of Heaven" have been universally praised, and the author was nominated for the Campbell Award for Best New Writer of 1999 and 2000.