To anyone interested in swedish iron age, and the viking age in particular, I heartily recommend reading any book at all by Mats G Larsson.
Not only is he an expert (senior lecturer in archeology at Lund´s university), he writes well, for a wide audience. He gives you context. I also like, having googled him, that he worked as an engineer for 20 years before he took his PhD in archeology. He probably has a sound perspective on what he is doing, and maybe that is what comes across in his books.
There is that quality of folkbildning, a swedish term that means educating the people, creating conscious and responsible citizens. This used to be a cornerstone of the social democratic vision of a better society. I think it should be again. It might help them win the next election.