In a way, all swimming stories are attempts to reacquaint our land-adapted selves with water. Why We Swim asks what's behind the human relationship to swimming. Our evolutionary ancestors swam for survival; now in the 21st century we swim in freezing Arctic waters, wide straits and channels, and piranha-infested rivers just because they are there. Swimming is an introspective (and silent) sport in a chaotic age; it's therapeutic for those who are injured, and it's an adventurous way to get from point A to point B. It's also one route to that elusive, ecstatic state of Flow. Propelled by stories of polar swim champions, a Baghdad swim club, the winningest Olympians, modern-day samurai swimmers, even an Icelandic fisherman who improbably survived a six-hour swim in the wintry Atlantic, the narrative takes us around the globe as Bonnie pursues swim culture and swimmers both living, recently living, and long gone.