I found this book absolutely fascinating - at last, a credible scientist prepared to question some of the unexplained mysteries that most lay-people are willing to give some credence to (that they happen) but which most scientists shy away from and pretend do not even exist. He's done the research and brings a level of rigour to the debate that is uncommon and refreshing. He argues more generally that science needs constantly to be questioning itself, challenging accepted wisdom, engaging in evidence-based debate within the science community, and not in the business of preserving self-serving taboos. He gives plenty of examples of how scientific debate has been shut down or avoided, where the subject matter is contentious. All well and good, but having argued vociferously for these principles throughout the book, he then finishes with a diatribe about how climate change is an accepted scientific fact and must be halted through massive human change and cost. This, I must admit, annoyed me, not only for its obvious hypocrisy (is there anything more nebulous, unreliable and vague as dodgy 'climate science'?) but also because I had hoped that Sheldrake would be one of the rare scientists out there prepared to challenge the 'consensus' about what is causing global warming, if only because there should be no such thing as 'consensus' in a proper scientific enquiry. He let me down at the last hurdle, and he should go take a closer look at the lucrative, politicised and often corrupt scientists' gravy train that is the 'global warming' industry.