Miller has done a masterful job of presenting potential futures resulting from exponential increases in intelligence - both human and machine. As a child in the 1950's and 1960's I worried about nuclear bombs; Miller has a similar worry about "seed" AI. The idea is that the first nation to reach a point where its artificial intelligence capacity (in a machine) can recursively improve its own cognitive abilities, will have a major competitive advantage (a head start on the resulting knowledge explosion). If we do not carefully program the seed AI to be "friendly", we'll be at risk. This is a wide ranging book. I read it in about four days, listening to part of it while driving to work. Miller is careful to explain both sides of an argument and, unlike some futurists, is not a talking head Pollyanna. His chapters range from technologies to augment human intelligence to "sex bots" who could potentially decrease availability for potential human mates (it seems out of character with the rest of the book that he does not discuss the flip side, from the female perspective). Of course, he also presents the potential for massive increases in wealth, health and fulfillment -- if things work out. This is a terrific read. Even if you think the concept of a singularity event is bunk, it is still worth reading for the many and entertaining side stories.