The Soldiers of Ares by Giorgio Groom

In a world where Technology and Magic have grown hand in hand, power is everything. And those who have power rule the world not as kings but as Gods. The Gods of Olympus have been in rule under the command of Emperor Zeus for over a thousand years. But the world is not at peace, the Olympian Gods still fight amongst themselves for more power and control for their own empires. When a young soldier named Maximus and his friends get caught in the middle of the power struggle between the Gods their lives take a drastic turn for the worse. Now hunted by the kingdom they once served they are forced to embark on a journey that makes them come face to face with terrifying monsters, unimaginable cities, legendary warriors and even the Gods themselves.