I have read most of Dawkins's previous books, "The Selfish Gene", "The Extended Phenotype" and "Climbing Mount Improbable" plus others. He is a scientific author of rare lucidity, explaining complex subjects using simple metaphors and crystal clear explanations. I can say without doubt that he, along with Matt Ridley, have changed my world view.
Some popular science books require mulitple readings of each paragraph to fully understand the book, (a certain wheelchair bound genius springs to mind!), or spread the facts/info out over agonisingly long chapters.(Horizon!)this is not the case with Mr Dawkins whos pace is almost perfect.
This is not to say that he avoids complex subjects, far from it, this book contains the most use of technical biological terms so far, giving examples of each species encountered in our journey from each ancestoral meeting point and explaining how they worked out the ancestoral tree.
He always explains the terms/concepts prior to using them, and continues to use metaphors whilist using the term to remind us of its meaning.
The final chapter gives theories of the origins of life.
The book showcases each of our mutual co-ancestors, ie the ancestor of Humans and chimpanzees, then they join our pilgimage back to the next co-ancestor. Until all life joins the final origin.
If your at all interested in HOW we are here, read this book!