In the Arctic, White, a marine conservationist, shimmies under the ice with an Inuit elder to hunt for mussels in the dark cavities left behind at low tide; in China, he races the Silver Dragon, a 25-foot tidal bore that crashes 80 miles up the Qiantang River; in Chile and Scotland, he investigates the growth of tidal power generation; and in Panama and Venice, he delves into how the threat of sea level rise is changing human culture – the very old and very new. Tides combines lyrical prose, colourful adventure travel and provocative scientific inquiry into the elemental, mysterious paradox that keeps our planet’s waters in constant motion.