The High Seas: Greed, Power and the Battle for the Unclaimed Ocean - Hardcoverby Olive Heffernan (Author) In this "essential guide to the half of our blue planet we call the high seas" (Will McCallum, author of How to Give Up Plastic), one of the world's leading voices on the issue tracks the race to exploit and protect our last frontier. Two thirds of the world's oceans lie beyond national borders. Owned by all nations and no nation simultaneously, the high seas are home to some of the richest and most biodiverse environments