Hotel Valhalla: Guide to the Norse Worlds. Rick Riordan. 2018.

Dear Magnus Chase, Welcome to Hotel Valhalla! We hope you enjoy your eternal stay with us in the Afterlife. 

This is a guide to the gods, mythical beings and fantastic creatures of the nine Norse worlds - now your fellow guests. 

There are stats, interviews, stories and anecdotes to help you avoid those awkward first introductions and make sure you never confuse a dwarf and an elf ever again. 

Your story is just beginning, Magnus Chase. We hope you find this guide an entertaining companion on your adventures.