In this artfully written book, Thompson (Come on Shore and We Will Kill and Eat You All) ably elucidates changing understandings of the ancient Polynesian migrations. This story, she tells readers, “is not so much [about] what happened as a story about how we know.” Since “we” here refers to Westerners, the narrative begins not with the prehistoric Polynesians but with Europeans' first journeys into the Pacific, most notably those of Capt. James Cook, the first European to recognize that the distantly dispersed islands he visited were all populated by related peoples.