"The Hidden Reality" reveals how major developments in different branches of fundamental theoretical physics -- relativistic, quantum, cosmological, unified, computational -- have all led us to consider one or another variety of parallel universe.

The bounds of reality : on parallel worlds -- Endless doppelgangers : the quilted multiverse -- Eternity and infinity : the inflationary multiverse -- Unifying nature's law s: on the road to string theory -- Hovering universes in nearby dimensions : the brane and cyclic multiverses -- New thinking about an old constant : the landscape multiverse -- Science and the multiverse : on inference, explanation, and prediction -- The many worlds of quantum measurement : the quantum multiverse -- Black holes and holograms : the holographic multiverse -- Universes, computers, and mathematical reality : the simulated and ultimate multiverses -- The limits of inquiry : multiverses and the future.