The cover made me worry that this was going to be complete pseudo-science, but it’s not bad at all. It’s a little scatterbrained — although the title is Virolution, a good chunk of it involves epigenetics, and it isn’t very clearly linked to the viral theme. The main thrust of the book is: evolution didn’t just happen by natural selection, but also through symbiosis. That symbiosis includes symbiosis with bacteria and viruses, as we co-evolved.
It’s not something I disagree with, and Ryan lays out the ideas clearly and informatively. I’m not sure I see such a huge role for viruses in evolution, at least not in the sense that he does. I don’t think it really modifies natural selection that much. Perhaps I’m just a little too familiar with stuff like Lynn Margulis’ theories about symbiosis? I’d always seen a fairly big role for symbiosis in evolution, because of course it drives co-evolution to establish stable mutualism.
Not a bad book, but perhaps a little too enthusiastic about its claims, and a little too scatterbrained about the content.