I read cozy and historical mysteries, a bit of Paranormal/UF, and to mix it up, I read science and gardening books on occasion.
 
I'm a Bill Bryson fan but this is my favorite of his as I'm interested in almost all things science (I'll admit - I don't like space stuff; it bores me).
I appreciate the fact that he takes very difficult topics and makes them accessible and interesting. His metaphors are very easy to picture and very illuminating. I also like the fact that he is careful to note that not all "facts" are in fact, facts - he makes sure he at least mentions opposing arguments or states that there's controversy over specific figures, theories, dates, etc.
I'd recommend this book to just about anyone interested in science or the history of science. I'd go so far as to say that vast portions of it would make excellent teaching resources.