Finalist, Hamilton Literary Award (Non-Fiction) Longlisted, SWCC Book Award (General Category) A Globe and Mail Best BookFive oceans cover approximately seventy per cent of the earth, yet we know little of what lies beneath them. Now, the race is on to completely map the oceans' floor. Scientists, investors, militaries, and private explorers are competing in this epic venture to obtain an accurate reading of this vast terrain and understand its contours and environment. In The Deepest Map, Laura Trethewey chronicles this race to the bottom. Following global efforts around the world, she documents Inuit-led crowdsourced mapping in the Arctic as climate change alters the landscape, a Texas millionaire's efforts to become the first man to dive to the deepest point in each ocean, and the increasingly fraught question of whether and how to mine the deep sea. A true tale of science, nature, technology, and extreme outdoor adventure, The Deepest Map both illuminates why we love - and fear - the earth's final frontier and contributes to increasingly urgent conversations about climate change.

A Globe and Mail Best Book of 2020 A Writers' Trust of Canada Best Book of the Year CBC Books: The Best Canadian Nonfiction Selection A Hill Times Top 100 Selection (2020) Silver Medal, The Miramichi Reader's "The Very Best!" Book AwardsAn exploration of the earth's last wild frontier, filled with high-stakes stories of people and places facing an uncertain future.On a life raft in the Mediterranean, a teenager from Ghana wonders whether he will reach Europe alive, and whether he will be allowed to stay. In the North Atlantic, a young chef disappears from a cruise ship, leaving a mystery for his friends and family to solve.  A water-squatting community battles eviction from a harbour in British Columbia, raising the question of who owns the water.The Imperilled Ocean by Laura Trethewey is a deeply reported work of narrative journalism that follows people as they head out to sea. What they discover holds inspiring and dire implications for the life of the ocean - and for all of us back on land. Battles are fought, fortunes made, lives lost, and the ocean approaches an uncertain future. Behind this human drama, the ocean is growing ever more unstable, threatening to upend life on land.