I'll give this four-stars, though I'm really not competent to rate this. I read substantial portions of it, but much of it is -- if not over my head -- at least too dry and scientific for my tastes and attention deficits. I'm a scientific illiterate, unfortunately -- and even in philosophy, epistemology was my weakest area. So this speculative, synthesizing approach to some highly technical aspects of cognitive evolution, memory storage, evolutionary biology -- what is the mode of awareness of fish, as opposed (say) to homuncular models of human consciousness... was both fascinating but, ultimately, more than I can handle. Those with a background or aptitude for this sort of thing might want to look at this book. The author seems to be quite brilliant, so far as I can tell -- and he is clearly dealing with some very key issues.