Seeing Double- Scalzi's Old Man's War challenges the senses.
Old man meets eternal life in Old Man's War; John Scalzi's recently published book. In it the hero has the good fortune of being able to exchange his body with a twenty year old body that has his own brain wave patterns (for thinking) and it has smart blood; that is blood that is highly oxygenated to handle all of the stress it will encounter. It also has a brain ban that will remind it of information it needs to know and help it locate things like say, cities or a battle site.
The book is highly entertaining.
How about you? When you get into your later years, say 70s or 80s would you like modern medicine to replace some of your major body parts? Would you prefer to be cloned entirely? Your thoughts please.