The Bones of Valhalla (Purge of Babylon, #9)
Finally it's over. This series started fast and pulpy, and ended both rushed (after 9 boooks! The whole plan, final battle, etc was in book 9!) and twiddling its thumbs, endlessly chattering and randomly killing characters we had not heard about for a couple of books, while others were kept aside for the surely forthcoming sequels.