The first in the pre-prequel Shannara series (The Word and Void) is on sale for Kindle.
From the Amazon description: On the hottest Fourth of July weekend in decades, two men have come to Hopewell, Illinois, site of a lengthy, bitter steel strike. One is a demon, dark servant of the Void, who will use the anger and frustration of the community to attain a terrible secret goal. The other is John Ross, a Knight of the Word, a man who, while he sleeps, lives in the hell the world will become if he fails to change its course on waking. Ross has been given the ability to see the future. But does he have the power to change it?