Bonnie Tsui joins us on the GrottoPod this week to read an excerpt from her latest book, "Why We Swim." The book, published in April, offers cultural and scientific exploration of our human relationship with water and swimming. Tsui is a journalist, a longtime contributor to the New York Times, and the author of "American Chinatown," the winner of the Asia/Pacific American Award for Literature and a San Francisco Chronicle bestseller. She lives, swims, and surfs in the San Francisco Bay Area. "Why We Swim" was an Editor's Choice/Staff pick in The New York Times Book Review, which called it "an enthusiastic and thoughtful work mixing history, journalism, and elements of memoir."