Artist and lifelong swimmer Lisa Congdon mines the history and stars of her favorite sport for “The Joy of Swimming: A Celebration of Our Love for Getting in the Water” (Chronicle). She heralds Johnny Weissmuller of “Tarzan” fame for being undefeated in official competition for his entire swimming career. And she notes that New York City has 25 times the population but half as many swimming pools as Iceland. She tells us which dogs are good swimmers, offers fun facts about the backstroke, and interviews ordinary people with a passion for swimming. It’s a sportive immersion.