Tito Ortiz recommended this book to me. I finally got to reading it. You come out of this journey with Kurzweil with an antimony of feeling: Rational Fear of the Future and Rational Optimism of the Future. It is long. The normal of us will not understand it well. I did not. However, you will get a feel of what is possible post 2030. There will not be a need for heart. The blood will flow by itself. Intelligence will be enhanced, not only by computers, but biologically.