Consider this book in two parts: A discussion of the sociology of trans-humanism, and the biased opinions of the author.
The sociology discussed is GREAT. James Hughes does an invigorating job of exploring the rough edges we will face as more trans-humans appear.
The opinions, however, are shrill, outdated and suspect. Hughes has an axe to grind and drags the reader through his interpretation of events, pundits and opinions. This is not a balanced discussion, we are only treated to a one-sided view of why he is right and his opponents are wrong.
Read this if you are searching for an interesting perspective on this topic, and are willing to float over the politics.