PositiveNew Scientist... an enjoyable and accessible introduction to the deep sea, told with a passion that I found infectious. The stories of life’s struggle for survival beneath the waves are compelling and Scales is particularly evocative when describing hydrothermal vents. I would have liked to read more about bioluminescence and the creatures that use it to dazzle predators and prey alike, however, and the book can become lost in detail when it leaves the deep, such as a pages-long digression about batteries. Overall, though, Scales brings to life this important part of our planet. What happens there is something we should all be concerned about.