Galdraskræða! Here’s how to talk to ravens if you can decipher it, there’s a few pages in Icelandic following it which probably tell you you need to carve it into a turnip with the bones of a wren using the blood from under your eyelid, then tie it to a pig and chase it around a small island three times.
I want this book so much; a friend of mine got a copy of it a few months ago and it is amazing. I’ve heard rumors, though, that there may soon be a version released in Icelandic-English. I certainly hope that they are true.