This is a very interesting book on an issue which has puzzled students of Earth history since at least the time of The Origin of Species in 1859; was the apparent explosion of animal life in the Cambrian period a real event, and if so what was its cause?
This book reads a bit like a scientific whodunit as the possibilities are considered and a suspect - or should I say, an explanation - emerges. The author, Professor of Palaeobiology at Oxford, has obviously been a very active researcher in the Precambrian over the years, and some might object that the descriptions of his expeditions slows in some the ways the discussion of the science. However, it makes one understand how knowledge is gained in the field (in more senses than one), how the theories are grounded, and is an inherent part of the argument.
There are plenty of ideas, and some touch upon fashionable concerns such complex adaptive systems and the ways in which the presence of life can mould the whole physical and chemical constitution of the Earth. These issues are not raised here because they are fashionable but because they may give us some useful insights into the data. The book is a report from a moving front, and so inevitably raises some questions which can't yet be answered. For example, I for one would have like to have some more conclusive information on the nature of the late Precambrian Ediacaran biota, whose members leave no trace of having had a mouth, a gut or bilateral symmetry - but as yet, we don't have it.
In short, this book is a very exciting window into a developing area of science, and into how that science is done. It also beautifully produced by OUP. The only doubt I have is the title. True, the sudden appearance of animal classes in the Cambrian, with little trace of what they had evolved from, was a worry to Darwin, but I suspect that had this not been published in an anniversary year, the great man's name might not have figured so prominently in the title. But, there again, times are hard and we all have livings to make, even academic publishers.