There's so much we don't know about what lies deep beneath the ocean's surface - and the time to find out is growing increasingly precious...

Professor Alex Rogers is one of the world's leading experts in marine biology and oceanology, and has spent his life studying the deep ocean - and in particular the impact of human activity on the ecosystems of the oceans.

In this timely, galvanizing and fascinating book - replete with stunning photography of strange and beautiful creatures - Professor Rogers offers a fundamentally optimistic view of humanity's relationship with the oceans - and also a very personal account of his own interaction with the seas.