I loved this book, tho it was a little short so i read it in maybe a couple of hours. Very intriguing. I love the what-if's and the scientists rushing to try to find the cause and solution. The payoff isn't as good as I would have hoped for, but the book seems more geared to the what-if's and the panic and making you think about frighteneing possibilities and skips the usual hero scenario that shows off man's ingenuity and intelligence that could stave off a potential global catastrophe. Overall I quite enjoyed it and it still makes my mind whirr when i think about it.