This is a rare find. An excellent read, written by an expert who avoids unecessary jargon but does not shy away from the level of detail needed to communicate the issues - a major fault of most "popular science" books. Where detail is needed, Stow takes the time to spell things out clearly and concisely. Some nice greyscale or line drawing illustrations are scattered through the book and serve the text well. The style is lucid and relaxed, with a good mix of personal backstory and anecdote that properly serve the substance rather than being merely thrown in to dilute the facts in case the reader cant handle them. Indeed these help to communicate Stow's enthusism and inspiration, as well as being a nice advert for a career in academic geology: there are even a few suggestions of nice food/wine combinations if you are ever visiting the sites Stow is discussing!
Stow anchors the book around the vanished ocean of Tethys, which gives the book shape, but this allows him to cover a huge range of material beyond the bare geology, including paleoclimatology, paleobiology and extinction theories, human evolution, marine sciences and critical discussion of pertinent scientific methods. These are all explained well and integrated into a wholistic view that he communicates superbly, drawing on personal and published data from sites ranging around the world, which he takes space to discuss and bring to life vividly. There is sufficient minor repetition in the different sections to prevent constant backflicking without being irritating. He is explicit about areas of uncertainty and controversy, and presents both sides. The book is very succesful at communicating the geologic concept of deep time and just how dynamic and changeable our planet continues to be at that scale, and Stow takes space to give a nice perspective in that light on the present debate on human contributions to the current extinction crisis and recent climate change. The book covers very different but slightly overlapping ground to Tony Hallam's very good
Catastrophes and Lesser Calamities: The causes of mass extinctions. If you enjoyed the wonderfully written
The Humans Who Went Extinct: Why Neanderthals died out and we survived by Clive Finlayson, you will find this as well written and cogently put together.
I have a medical background obviously not in this field and I think this book is a triumph for the interested non-specialist reader, and an outstanding example of "academic popular science" if you get my gist. If you are at all interested in the history of our planet and its life, and are willing to be taken beyond irritatingly facile TV documentaries that are so prevalent, you should read this book. I took it on holiday and a chapter or so each day made a fine and more stimulating accompanyment to my other diet of fiction.