How well do you know the nine Norse realms? Do you get all those heims mixed up? Well, this collection of short stories - each set in a different world and told by a different character from the Magnus Chase series - will help straighten you out. And even if it doesn't, you'll enjoy reading about how Alex saves Amir's pants, Samirah plucks a giant's harp, Mallory teaches a dragon how to throw down insults, and much more.

Just watch out for Thor, who is running through the whole thing and raising quite a stink.