Kindle says 47% of the way through as of last night, and I have to say this first bit has been really excellent. I've talked to a lot of people who have said roughly the same thing. The first 2/3 of the book is the exact kind of awesome hard sci-fi book that I'm loving right now. The last 1/3 is a thought experiment set 5000 years in the future that actually detracts from the awesomeness of the book and almost would have been better as a sequel. I would have read 1000 pages of just this near future story. I want to capture an asteroid and build a huge complex in orbit. edit: Oh and check out the illustrations on the inside of the endpapers if you pickup the hard cover. They're gorgeous.
