Reading Jag 43 - don't worry about spoilers
by Paul Davies and John Gribbin.
John Gribbin is one of my favorite science popularlisers. Even though there's a huge amount of information crammed into this book, he and Davies do a great job of keeping the facts clear. (OK - I think that they've conflated the 'many worlds' quantum interpretation with the Landscapes of string theory in their description of the anthropic principle, but other than that...)
Very cool stuff.