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, galvanising 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.