In O My America , the travel writer and biographer Sara Wheeler embarks on a journey across the United States, guided by the adventures of six women who reinvented themselves as they chased the frontier west. Wheeler's career has propelled her from pole to pole--camping in Arctic igloos, tracking Indian elephants, contemplating East African swamps so hot that toads explode--but as she stared down the uncharted territory of middle age, she found herself...