With its sun-bleached shores and stunning islands, the Indian Ocean washes over some of the most beautiful and exotic locations on the planet. But the world's third largest body of water is also crucial to its future - politically, economically and environmentally. From pirates plaguing ships off the coast of Somalia, to the Tamils of Sri Lanka, the region touches places of extreme volatility. It is also increasingly the hub of global trade and competition. Simon Reeve brings his unique brand of adventure journalism to this portrait of a fascinating and increasingly important area.