For Magnus Chase: Hotel Valhalla Guide to the Norse Worlds — Rick Riordan

So you've made it to Valhalla. Now what?

This "who's who" guide to the gods, goddesses, and other important figures of Norse mythology was commissioned by Helgi, who, after more than a millennium as manager of Hotel Valhalla, became fed up with answering the same questions from newly deceased heroes at check-in. The profiles provide essential stats, interviews, and personal reflections so you can identify the gods and avoid those awkward introductions. Handy facts about other beings round out this go-to tome. You'll never see Ratatosk as a cute little rodent or confuse a dwarf with an elf ever again!