Back to the Future: Dice Through Time (Saturday Review)
"So, let me illustrate. Imagine a line that represents time and at one point is 1985, to the left of it the past and to the right of it the future. If we travel back in time and make some small changes, the timeline skews off at an angle, creating an alternate 1985 - or rather, it's an alternate to you, Einstein and me, but a complete reality for everyone else. It turns out that Biff took the Sports Almanac into the past and thereby created this new timeline. It's now up to us to find a new way to get Back to the Future: Dice Through Time by Ravensburger."