Combining travel and sports writing with cultural history, Why We Swim is a bracing collection of stories from the world’s untamed waters and community pools, and writer Bonnie Tsui, a near-daily swimmer whose parents met poolside, is the perfect guide to the life aquatic. From the free-diving superpowers of Southeast Asia’s sea nomads to the habits of Olympian world record-holders, she ponders how humans have evolved for land yet been drawn for millennia to water: Neolithic cave paintings featuring swimmers date back ten thousand years. If you’re part selkie—a half-seal, half-human character of North Atlantic folklore—then Tsui might inspire you to try diving two hundred feet down in the ocean, or, if extreme cold is more your thing, joining the International Ice Swimming Association. Even if you’re like me, recovering from a childhood of failed pool lessons, here is the push to cannonball, once and for all, into the deep end.