You want to talk about an out-there outlier for what we’ve seen of Stephen King’s bibliography so far, let’s talk about The Dead Zone.
A quick run-down: John Smith suffers a head injury as a kid but comes out mostly ok. Greg Stillson is a crazy but wildly charismatic traveling salesman. Johnny becomes a teacher, falls in love, and then is driven into a coma by a car accident. When he emerges he has wild psychic powers where he can touch people and know both their secrets and their future. He endures some tabloid celebrity, solves murders, tries to keep teaching and being normal, saves some kids from dying, and then discovers that Stillson, now running for office, is going to win and eventually become President briefly before destroying the world in a nuclear holocaust. Johnny becomes a would-be assassin, dying but also revealing Stillson to be a huge coward and an electoral loser after he grabs a kid as a human shield. It’s a timely examination of the American hunger for an end to the seemingly endless corrupt two-party circus and a bit of a satire of the then-blossoming American Tabloid market.