The Big Time: Winner Hugo Award for Best Science Fiction Novel

Have you ever worried about your memory, because it doesn't seem to recall exactly the same past from one day to the next?

Have you ever thought that the whole universe might be a crazy, mixed-up dream?

If you have, then you've had hints of the Change War. It's been going on for a billion years and it will last another billion or so.

Up and down the timeline, the two sides - "Spiders" and "Snakes" - battle endlessly to change the future and the past.

Our lives, our memories, are their battl...