"How inappropriate to call this planet Earth when it is quite clearly Ocean." Since time immemorial, humans have been captivated by water. No wonder: it's the most omnipresent substance on Earth and without it life itself would be impossible. From the plankton that provide more than half of our planet's oxygen to the blue whale, life in the ocean greatly affects life on land and plays a crucial role in regulating our climate and atmosphere. Combining images from world's leading marine and nature photographers, and the latest in underwater photography techniques, the bestselling author of The Life & Love of Trees and Rainforest, Lewis Blackwell, explores our innate relationship with the sea - from when our ancestors first emerged from the primordial soup to the sophisticated marine farming industry of today - and why our future depends on preserving and protecting our planet's single biggest ecosystem. Includes stunning bonus footage via a scannable QR code from multi award-winning underwater cameraman Steven Hathaway, whose work has featured in numerous documentaries on BBC, Discovery Channel and National Geographic.