When the Vikings invaded and conquered England, France, and Ireland, they opened a new and fascinating chapter in their history. The nature of the beset lands, the traditions and character of their peoples, and the strengths and weaknesses of the various Viking leaders made each of these three invasions distinct from the others. And each produced a different and surprising result. In sum, award-winning journalist Robert Wernick asserts in this provocative short-form book, they forever altered the course of medieval history.
I borrowed this as an e-book from the library not realizing it was a young-adult book. However if you want a very quick and dirty introduction to the Vikings this is a pretty good place to start. It touches on the Viking raids and later conquests of France England and Ireland but it is not a comprehensive history by any stretch of the imagination.
It might be a good initial primer for someone who is going to watch the TV series....