Invoker trilogy

1.

"The people of Nine Lands know their history. The kingdom once belonged to the Scathed people--until their greyblood servants rose up and slaughtered them. King Ahiki and his warlords laid claim to the realm by defeating the rebels and driving them out to the Feverlands. Now, thousands of years later, attacks by the greybloods are rebuffed by the invoker clans, warriors of noble blood who summon their ancestors to fight with them in battle. But the...