I'm still reading the book, so my review might change, but as it currently stands there is a mistake when they are telling the story of Ragnarok. The quote from the book is "On the ship will be an army of giants and their captain, Loki, who's now broke free from his chains." I looked into this quote because it didn't seem right and In Norse mythology, Hrym, Rym, or Hrymer (Old Norse "decrepit") is a jötunn and the captain of the ship Naglfar. So as I said my review may change as I continue to read the book, I will continue to update the review if I find more issues.