Régis Boyer presents us in this work colonization of Iceland and Greenland by Scandinavian and attempts to decipher the myth of the discovery of North America would have been the work of the first settlers Greenlanders. It builds to be done on a study of texts ranging from eras in question, many on Iceland until some newer ones that are like this text attempts to analyze these historical movements. Regarding the Vinland stories successive expeditions these lands are virtually nonexistent and the author undertakes a comparison here various information sources that have survived, the sagas of Eirikr red and Greenlandic being the main. Régis Boyer wants very factual throughout this book and pushes us to always question what we would regard as historic, mainly regarding Vinland, although it suggests that these findings probably ( hypothetically) took place.