I don't have them in front of me but I remember a couple of books that might come in handy for you: I have the Edda sagas in Spanish, the Alianza releases are pretty good. I always like to have primary sources alongside guides so I'd rec you get a copy of the Edda to start with. Penguin has a pretty straightforward guide. I really like that author, this is also by him and I even prefer it to the Penguin guide, but they are both useful. My favourite, though, is Exploring the Northern Tradition.
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Hope any of that helps.