I couldn't find one on the LS website. They don't do very many companion books (yet?). I think you would do well with a good general Tarot book (78 Degrees of Wisdom comes to mind) and another good book on Norse history or mythology (is there any mythology in this deck?). And, of course, this website has a wealth of information and everyone is happy to help when you get stuck.
I also highly recommend Tarot for Self Discovery by Nina Lee Braden. To paraphrase her, you don't have to know how to read Tarot to use the book but you will learn how by using the book. Putting the Tarot to Work by Mark McElroy, I think, also works like this but with an emphasis on business. I just got it the other day, and I'm not very far into it, but I love it! I think they're both kind of "teach yourself" books. The authors let you come to conclusions about interpretations on your own.
As for beginner's decks, there's no such thing! There are spreads and books and maybe even methods that are better for beginners, but pick the deck you like most no matter what anyone else says. My opinion, of course.
Peace,
April