Superintelligence: Paths, Dangers, Strategies

If you're familiar with x-risk, there isn't a lot for you in this book, except perhaps a better understanding of just how risky x-risk can be. For the uninitiated, however, I would wholeheartedly recommend this book to you – it briefly chronicles what likely may be humanity's most important (and last, one way or another) achievement, and how terrible it will be if we get it wrong.

Here are the particular passages I underlined while reading through Superintelligence:
http://sandymaguire.me/books/nick-bostrom-superintelligence.html