The Life That Lives On Man by Michael Andrews

All books are second hand
Michael Andrews
9780099165002

Unpleasant fact: Each of us has, variously sitting, crawling and hopping over our body, about as many organisms as there are people on earth.
The point of Andrews' superb book is that not only are we unable to eliminate most of our fellow travelers, but in most cases it's not even a good idea to try.