I read a book once where an agent of a futuristic multi-planet government was sent on a mission, and in doing so, used a machine to impress copies of his mind on other people to send them.
I remember no names, of people or locations, but I can describe what I do remember.
The place the copies of this man were sent was a planetary system that was used as a prison. The planets were used as a prison because of a unique type of bacteria or virus that lived there. Whenever that bacteria would go too far from the planet, it'd die, and take any organism that it was inside with it. There were 4 planets in the system, and copies of this man were sent to each one. Each planet granted the copy one "power", unique to the planet, through the bacterium. In one world the bacteria would break down everything man-made remarkably quick, but some people could control them enough to stop, and even create things for you. Another gave people the ability to swap minds during sleep, waaking up into a different body altogether. A third gave the man "adaptive DNA", so to speak. He subconsciously would change his DNA to match the environment, which could've meant a sex change, if he lived in an all-male environment. And sadly, I dont remember the 4th well at all. I just know someone became a dragon at some point, and that someone was blind.
Anyway, I read this book at my high school library. That copy was a plain brown cover, no title or anything, and although the name was inside, I have forgotten it. I have forgotten it and the author and all the unique names to search for, and all my searching for the things in this description have yielded nothing. If anyone knows this book, please tell me its name, or anything that could lead to me finding this book again.