Fred and Ellie are twins. But not identical (because that’s impossible for a boy and a girl). They do like all the same things, though. Especially video games. Which they are very good at. They aren’t that good, however, at much else – like, for example, football, or dealing with the school bullies.

Then they meet Mystery Man, who sends them a video-game controller, which doesn’t look like any other controller they’ve ever seen. And it doesn’t control any of their usual games …

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