Call of the Hero (Sanctuary, #10)

The city of Reikonos is prisoner to a tyrant.

After a thousand years, Cyrus Davidon and the guild of Sanctuary have returned to find the human capital in a terrible state: food is in short supply, the skies are choked with the smoke of industry, and a criminal gang known as the Machine prey on all who dare raise their hand in opposition to the Lord Protector.

When an old enemy reveals himself, the revolt that Cyrus has begun to raise comes up against a seemingly insurmountable stumbling block. But rise they must, for time is running out in the city of Reikonos, and if Cyrus cannot answer the call of his heart and free his home in time...all will perish.