Sage Alexander and the blood of Seth

"Sage Alexander's life was irreparably changed when he learned that the strange manifestations he--and only he--had seen his whole life were real. After learning of, and harnessing, his otherworldly powers, Sage saves his father from Greed, one of the Seven Princes of Hell, and has only just brought things back to normal, or so he thinks, when the Prince of Sloth grasps Sage's little brother, Nick. Will Sage defeat Sloth, or will his journey meet its end?"--Provided by publisher.