Behind the Vale — Brian D. Anderson

Thousands of years after the war of the ancients, a single bastion of human life survives - The Vale. And at its core the magnificent city of Troi. Here the mana flows from the great power station, bringing light and life to all. It is a beacon of hope in a sick and dying world. But all is not as it appears. Even as the Order of High Mages seeks to cure the land, sinister forces move to gain absolute control over The Vale and its citizens.
Drake Sharazi, disgraced Royal Guard turned bounty hunter, has been exiled from Troi to the surrounding provinces, where resources are limited and starvation is commonplace. It is in this squalor and poverty he believes he shall spend his remaining days. But after years of labor and suffering, he has been given the chance to go home; to return to the life he has longed for since the moment he left his beloved city. But he quickly discovers that the life he desires is built on a foundation of lies.
Now he must choose between what is right and what is easy. But what is right could cost more than he is willing to pay. And to save his home, he might have to destroy it...and all he has ever loved.