I think we can all agree that Pennywise is Stephen King's scariest villain, right? I mean, sure, longtime Stephen King readers know that Randall Flagg/The Man in Black is the most ubiquitous and influential in-universe of all King's baddies. But let's be real: If you've ever had a hard time sleeping at night thanks to the King of Horror, it's almost certainly because of Pennywise.Stephen King's novel It, first published in 1986, is known for its whopping...