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This book received some good reviews by others, but after I labored my way through the first half, I just could not finish the journey of the Vikings. For some reason I could not follow their path as described by Wernick. One moment we were in the ninth century in one country, the next in the tenth century in another. Then back again to the ninth century somewhere else. I felt like I was reading a science-fiction time travel story with no clear course. My hat is off to those who enjoyed it and learned from it. I could do neither.