The second book I'd like to nominate this month is The Hidden Reality: Universes and the Deep Laws of the Cosmos by Brian Greene
From CultureLab editor Amanda Gefter's review ("A tour of the multiverses") for New Scientist:
.....Arcane yet exciting physics, wrapped up in effortless prose. Yes, Brian Greene has done it again. His new book, The Hidden Reality, does for multiverses what his bestseller The Elegant Universe did for string theory: it provides the general reader with a thorough, engaging survey of the subject that manages to make highly abstract ideas sound implausibly comprehensible. ... [T]here couldn't be a better time for a book to sort out the many strange passages of the multiverse. To start, there is more than one notion of a multiverse; Greene tackles nine. They range from the bubble universes spawned by a continuous chain of big bangs to the possibility that we may one day create simulated universes on our desktops. You may be reading this in a simulated world right now. Or perhaps infinite versions of you are reading this over and over, scattered throughout relentlessly expansive space. One thing, though, is common to all views: reality is not what it seems.