In Sunken Lands the author takes us on a journey of discovery through places that have disappeared and those that may vanish in the not too distant future. Some of the places are looked at through legend, myth and oral histories. Others are discovered through the remnants left behind. The author has long had a fascination with drowned places and his interest and enthusiasm come over clearly in this book. The chapters look at various places and/or legends of flooded places and what may or may not have caused them. The author looks at what people affected by those floods may have felt. He also looks at what may be to come in the ebb and flow of Earth's cycles. I found the first chapter fascinating. It provides an excellent overview of some 20000 years of Earth's climate history and natural disasters from the Elder Dryas to relatively modern times. Ice ages, earthquakes, floods and tsunamis feature as well as possible comet impacts. Actual evidence is considered as well as legends which can often be a form of oral history. I certainly did not know that there are some 2000 known global flood stories. From here the author goes on to explain the origins of his fascination with floods and flooded lands. These obvious illustrations of the ebb and flow of the Earth leads to some thoughts on "extreme" events that may occur in the future. Most of the remaining chapters look at specific geographical areas. In many cases the author explores the areas himself. It is fair to say that not every chapter had the impact that the first chapter did however a number of them worked very well. I will highlight a couple of those. As someone who has lived in and explored parts of the western sides of England and Wales I found it easy to relate to the stories of these areas. I'd include in that the Celtic aspects - including those of Brittany. The geography of the world as we are used to seeing it is relatively recent in a world time sense. Our island was attached to the continent and Ireland for quite long periods of time. Certainly the land we now know extended further west. This means that legends of land between Ireland and Wales that was flooded is almost certainly true. Equally the Isles of Scilly are simply the remaining remnants of a larger landmass to the west. The chapters about these I really enjoyed. Drawing this book to a close the two last chapters look at "now" and some thoughts about the future in addition to giving something of an overview of the book. For me this seem to bring the whole book back together very well. It's fair to say that this is an agenda involved in this book although I didn't feel it was being inflicted on me. It is not a book that climate change deniers will probably want to read. I feel it is a book best approached with an open mind. Over many centuries at least to our knowledge sea levels have risen and fallen for a variety of reasons. Evidence of that is clearly laid out here. It's a book that takes a "long view" of our world and its changes. Aspects of this book I really loved. There is no question that for me the chapters that involved the author's travels were most interesting and probably particularly the UK sections of the book. However that is probably simply my bias and others will find different parts that will interest them. I found this a very rewarding and thought provoking read. Note - I received an advance digital copy of this book from the publisher in exchange for a fair review