The Dead Zone

The book started off really good then slowly started to peter off but is still one of my favorites.
It's a sci-fi/murder mystery/thriller about a clairvoyant named Jimmy, who after a bad wreck wakes from a coma with the ability to tell certain things in the future by touching people. When people find out he's not a phony they bombard him with wanting their future told, only some don't like what they hear. He decides to keep his secret hidden but eventually he must drag it out again to solve a murder and later after shaking hands with a politician he realizes that he must do something to save the world from this tyrant.