An all-nighter. One of those books that you won't want to put down. I started it a 7 PM on Wednesday, I was done at 2 PM on Thursday.
The basic question behind the book. What if human beings decided to upgrade? Homo Sapien 3.0. And it doesn't happen over 10,000 years. It happens almost overnight. Just like a Windows upgrade, it doesn't go well at first. Millions of babies are stillborn. The government thinks its a virus. A few scientists think it's evolution at work. Nature working out the kinks as it brings a major upgrade to the human species. Greg Bear goes fairly deep in evolutionary biology in the story. You'll learn something along the way too. Although the idea of humans suddenly giving birth to new humans so different as to almost be alien is a huge leap of faith, the reactions of the public and the government are exactly what I would expect should such a situation occur.
And if such a situation does occur, let us all pray the human upgrade goes more smoothly than the typical Windows upgrade :)
Buy this book. Get it from the library. Borrow it from a friend. Just read it.