'Thrilling' Hugh Fearnley-Whittingstall 'Authoritative and furious, urgent and persuasive' Sunday Times 'Compelling ... Roberts is that precious pearl: a practising scientist who not only knows his field inside out, but also understands how to write' Guardian Oceans are the most mysterious places on earth. Their depths remain largely unexplored, yet ninety-five percent of the planet's habitable space lies within them....