The Selfish Gene was originally published in 1976 and remains a brilliant, amazing explanation and perspective on evolution at a gene level. It's also the book wherein the word "meme" is invented. I'd read this decades ago of course, back in the 80s and I highly recommend that everyone should read it.

That said, I am now listening to the audio book version of the updated edition, and I really don't recommend that, which is why not 5 stars. The problem with the audio book is that footnotes just don't work. And the updated edition is absolutely full of footnotes that interrupt the main text. Dawkins decided to get around this problem in the audiobook by having a female narrator read the main text and by interrupting in his own voice with the footnotes. Sounds good in theory, but it makes it really hard to follow the chapters if you don't already know and understand the topic. In addition, while Dawkins is undeniably an amazingly brilliant scientist, he's also quite a conceited jerk on a personal level. Many of his footnotes aren't even updated facts at all, they're just him taking the opportunity to respond to critics of the original book by pointing out how they're all wrong. I wasn't two chapters in before I was super annoyed at his voice constantly interrupting the narration to say things like "Stephen J Gould critiqued my point here but clearly he completely failed to notice I already made the same argument he did in chapter 8" or similar.

So, absolutely read the book, and pick up the updated edition in print if you want the latest revisions, but definitely avoid the audiobook form unless you can find the original edition.