Things you didn't even know that you didn't know.

The Universe Next Door: The Making of Tomorrow's Science - Marcus Chown

While a little out of date, starting operations at CERN in 2006 in discussed as a future event, this is the best book I've read so far on quantum physics and parallel universes. Apart from some sections on plancks and branes that went over my head, I got a lot from it as a lay-person and it made me want to learn more. Mirror worlds and particles; tricksy atoms that can be in more than one place at once; the likelihood that our universe is teeming with life, originating from asteroids that seed any planet with enough warmth to have liquid water; and that six missing dimensions that must exist for wave theory to be correct, might be folded so small that we cannot perceive them.