A book by Ray Kurzweil about the inevitability of computers becoming more powerful than the human brain and gaining consciousness, what consciousness means and where it comes from (and how computers can have it), and what the future holds for us.
I’ve just started reading, but this is turning out to be a fascinating book, more complete in its treatment of the topic than I thought it would be. This is a topic I’ve found fascinating ever since reading Diaspora and Permutation City.
Done reading (actually, that was a while ago, before starting Are We Spiritual Machines?.