The Undoing by Shelly Laurenston

Update, I read book two of Shelly Laurenston's Crows series.

1. Not about Erin. It's about Jace Berisha, the berserker girl in the first book who likes to hide in closets and read depressing books.
2. Better than the first book.

Now that the world has been established in the first book, she spends less time explaining things, which is nice. And you get to see more of the group dynamic between the different viking clans, which is where the humor comes into play.

My only complaint, and this is a big one, is that she introduces the most amazing backstory about Jace and doesn't go into it in more detail. It ends with Jace walking into her grandmother's house for dinner. FULL STOP. Discovering Jace's back story was the best part of the whole book, including how amazing her grandmother is. The second best part being how cute Ski Eriksen (the love interest) is.

I hope there's going to be a whole book just on Jace and her family...