I listened to the audiobook version of I Contain Multitudes on my commute to and from school four days a week. I'm a biotechnology major so I have some background in some of the things Ed Yong was talking about which may have increased the enjoyment I got out of the book. It was detailed, expansive, and glorious. The reach of microbes outside of humans is also well discussed and truly fascinating. I admit to crying a little in my car at the end of the book at the miraculous nature of microbes. Sometimes I cry watching really sad commercials too so maybe don't put too much stock in that last bit. It's still an excellent book.