"The Pure Land - About the Art of Inventing One's Ancestors" is a story about some mostly made up or third-hand Roman nonsense (Tacitus' Germania) became the basis for a national mythology that stretches all the time way into today, about the idea of Sweden as homogenous (spoiler: it never was), about how ideas of race grew into an international ideology only to be forgotten when it became politically inconvenient, even as the myths live on.