Nikolai takes you into the world of Odin. Twins, Erik and Ronja, are treated to their older sister's ill advised meeting with Odin because he treated her without respect and maid her pregnant with his child. The twins decided to hunt Odin and were called Odinsbane because of this intent. What happened was that they ran into a witch, Ingvild, that wasn't a black witch and also ran into a Huldr which saves them in the future. There's a lot of scenarios that have taken place but you will be struck dumb by what happens in the end. Nikolai ends it with what can be another novel.