There’s nothing like a stunning twist or shock to keep readers flipping, clicking or swiping pages. Part of the fun for readers is thinking a story is going one way, and getting taken completely by surprise.
Harlan Coben is one of the reigning kings of the art of surprise. “I’ve rarely met a twist I didn’t like,” he has said. His method, if it can be called that, is to write himself “into a lot of corners” and see how things work out. That’s one way to go. Forcing your writer’s mind to deal with conundrums is a great practice.