This is a book I'd meant to buy but didn't. Then I was futzing around on my library's home page and found that I could take out the audio version of this and hear it on my Kindle Fire, which I'd just bought (OK, I'm a late adopter to this, but I was emailing people in 1994, you know), so I downloaded it. It's not the kind of book you want to take in that way. Not that the science in it isn't friendly to non-scientists, i.e., pretty much everybody, but no matter how easy-to-digest such things are, you want to be able to read them at your own pace and, as or more importantly, re-read parts of them.