In reading order
The Arthurian Relic
Andrew Clawson
The Emerald Tablet
Andrew Clawson
The Celtic Quest
Andrew Clawson
The Achilles Legend
Andrew Clawson
The Pagan Hammer
Andrew Clawson
The Pharaoh's Amulet
Andrew Clawson
The Thracian Idol
Andrew Clawson
The Antikythera Code
Andrew Clawson
The Charlemagne Accord
Andrew Clawson
The Centurion's Spear
Andrew Clawson
The Centurion's Spear
Andrew Clawson