Campbell reviews a lot of history and myth around the Norse's travels west, and he doesn't pull any punches. He applies rigorous academic and scientific standards to his review. Much of what people would like to believe about the Norse in North America, particularly the US, he shows as fake or inconclusive. He also shows a not-common-enough respect, sensitivity and thoughtfulness to Native Anericans and First Peoples. 

This is a thoughtful book well worth the read.

One note for sharp-eye readers: there are quite a few typos in the first edition. Given that this was produced during the pandemic, it's understandable, and none of the errors inhibit comprehension. I hope Oxford will take time to correct them for future printings.