James Nestor’s book Deep: Freediving, Renegade Science, and What the Ocean Tells Us about Ourselves is both literally and figuratively the most breathtaking book I’ve ever read. It’s literally breathtaking because it’s about freediving, AKA diving sans scuba equipment, an activity as awe-inspiring as it is dangerous. (Side effects may include death, blood squirting out of your nose, mouth, and eyeballs, and paralysis.) Herbert Nitsch, the world’s self-proclaimed “deepest man” dove more than 800 feet on a single breath without using a scuba tank. And he lived to tell the tale.
Deep is also figuratively breathtaking because it reveals some of the most awe-inspiring facts about our ocean that you’ll ever read. Freediving is the only way to see sperm whales up close and personal. These behemoths' brains are shockingly similar to our own and allow them to communicate using a click-based language. Resulting studies have even shown that sperm whales have their own culture and distinct accents.
But freediving with sperm whales is, naturally, not without risks. Sperm whales’ clicks are so loud, their pulsations can literally kill us. One intrepid freediver found his hand temporarily paralyzed when a sperm whale greeted him with a click.
Deep is the rare sort of nonfiction book that reads like a thriller novel. Every page is chock-full of awe-inspiring revelations that will make you look at the sea with a sense of wonder typically reserved for children. Scientific journalism has never been this entertaining.