From the back of the book:
JOURNEY TO RAGNAROK is an adventure and setting module for 5e characters of level 1st to 15th, inspired by Norse myths and legends.
It is a captivating adventure that will lead the Heroes from Midgardr through the Nine Worlds.
In an epic journey, the fate of men will be tied to that of the gods, until the final moment, the Ragnarok.
This book includes:
Setting guide to the Nine Worlds
6 Clans fighting for supremacy over Midgardr
12 new and exclusive archetypes
1 new class to discover, the Rune Master
8 Backgrounds inspired by Norse society
Rune Divination System
Descriptions and statblocks of Gods and mythological beasts
New and legendary magical items
An epic adventure for 1st to 15th level characters