Subtitled ‘the hunt for dark matter and dark energy in the universe’, this is a book that doesn’t fulfil its promise. It does have a quite reasonable explanation of general relativity, but that’s just a sideline for the main topic of dark matter and dark energy, and the problem here, I think, is that it is, as yet, a failed hunt. It’s a bit like a true crime book about a murder that was never solved – tantalizing, but never delivering. Because we don’t know what dark matter and dark energy are, it’s a difficult one to carry forward. This isn’t helped by a certain fixedness of viewpoint. It would have been more interesting if Evalyn Gates had opened up some of the many uncertainties in cosmology, but she presents the Big Bang as effectively certain, telling us ‘[the cosmic microwave background] effectively nailed the case for the Big Bang model’, when it equally supports pretty well all the main alternative theories, and though she briefly opens up the MOND ideas of variations in...