There are 14 books in the Empire series. The newest book is Clash of Legions which came out in 2024.

Marcus Valerius Aquila has scarcely landed in Britannia when he has to run for his life - condemned to dishonorable death by power-crazed Emperor Commodus. The plan is to take a new name, serve in an obscure regiment on Hadrian's Wall and lie low until he can hope for justice.…
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2
Arrows of Fury

Book cover of Arrows of Fury
The Battle of the Lost Eagle saved Hadrian's Wall, but the new Roman governor of Britannia must stamp out the rebellion of the northern tribes or risk losing the province. Rampaging south with sword and flame under the command of their murderous chieftain Calgus, they have stretched his forces to…

3
Fortress of Spears

Book cover of Fortress of Spears
In the enthralling third volume of Empire, Anthony Riches takes the legions deep into north Britannia, where the survivors of the rebellion still hope for revenge. The Romans have vanquished the rebel alliance, leaving Calgus, Lord of the Northern Tribes, the prisoner of the chieftains he once led. But the…

4
The Leopard Sword

Book cover of The Leopard Sword

Britannia has been subdued - and an epic new chapter in Marcus Valerius Aquila's life begins.

The murderous Roman agents who nearly captured Marcus have been defeated by his friends. But in order to protect those very friends from the wrath of the emperor, he must leave the province which…

5
The Wolf's Gold

Book cover of The Wolf's Gold

Fresh from their victory in Germania, Marcus Aquila and the Tungrians have been sent to Dacia, on the north-eastern edge of the Roman Empire, with the mission to safeguard a major source of imperial power.
The mines of Alburnus Major contain enough gold to pave the road to Rome. They…

6
The Eagle's Vengeance

Book cover of The Eagle's Vengeance

The Tungrian auxiliary cohorts return to Hadrian's Wall after their successful Dacian campaign, only to find Britannia in chaos. The legions are overstretched, struggling to man the forts of the northern frontier in the face of increasing barbarian resistance.
The Tungrians are the only soldiers who can be sent into…

7
The Emperor's Knives

Book cover of The Emperor's Knives

The seventh novel in Anthony Riches' acclaimed Empire sequence brings Marcus Aquila back to Rome, hunting the men who destroyed his family.

But the revenge he craves may cost him and those around him dearly.

The young centurion's urge to exact his own brutal justice upon the shadowy cabal of…

8
Thunder of the Gods

Book cover of Thunder of the Gods

'A master of the genre' The Times

The eighth book in the Empire sequence takes Centurion Marcus Aquila and his Tungrian legion on a dangerous mission to the heart of the Parthian empire.

With Rome no longer safe Marcus and the Tungrians are ordered east, to the desolate border lands…

9
Altar of Blood

Book cover of Altar of Blood

'A master of the genre' The Times

The ninth novel in the thrilling Empire sequence leads Centurion Marcus Aquila and the Tungrians to the battlefield that was one of Rome's most disastrous defeats.

The Tungrians have no sooner returned to Rome than they find themselves tasked with a very different…

10
The Scorpion's Strike

Book cover of The Scorpion's Strike

With his compelling Centurions trilogy complete, Anthony Riches returns to his bestselling Empire sequence of novels with his storytelling skills polished to perfection.

Set in the second century AD, The Scorpion's Strike continues the story of Marcus Aquila's fight for justice for a family ripped asunder by imperial assassins.

Still…

11
River of Gold

Book cover of River of Gold

After saving the emperor's life in Rome, Marcus and his comrades have been sent across the sea to the wealthy, corrupt Greek metropolis of Aegyptus, Alexandria.
An unknown enemy has slaughtered the garrison of the Empire's last outpost before its border with the mysterious kingdom of Kush. Caravans can no…

12
Vengeance

Book cover of Vengeance

After saving the Empire's richest province from a foreign army, Marcus and the men who protect him have been in hiding. Their lives will be forfeit if they are seen in Rome.

But times have changed. Marcus's protector, the patrician legion commander Scaurus, has been summoned home by his mentor,…

13
Storm of War

Book cover of Storm of War

Marcus Aquila and his allies spearhead a daring attack into enemy territory, as three generals claim to be the true Roman Emperor.

A new civil war has begun: with the emperor Pertinax's murder Marcus and his protector Scaurus have escaped Rome, seeking sanctuary for their familia in the East.

But…

14
Clash of Legions

Book cover of Clash of Legions

Two emperors - one must fall

Marcus Aquila and his patron Rutlius Scaurus have fought a superior enemy force to a standstill in Thracia, gaining the favour of the gods but paying a grievous cost in their family's blood.
Battle-weary and mourning their losses, they are tasked with rooting out…