From publisher blurb:
Bombs fell. Billions died. Now you must pick up the pieces and rebuild this Broken Earth.
Broken Earth is an adventure setting that takes place in a post-apocalyptic version of Earth. It deals with a small fraction of the world, what was once the northern Midwest of the United States, and a tiny bit of southern Central Canada. As an adventure setting, Broken Earth includes many compelling locations and adventures, but also gives the heroes freedom to explore the world.
The book gives the GM everything you need to run a prolonged campaign in the Broken Earth setting, including locations, NPCs, plot points, mutant monsters, and a detailed first adventure that brings the party together.
This book also contains everything in the Broken Earth Player's Guide. If you are a player in a Broken Earth campaign you might want to check out the Player's Guide instead. If you are a GM you should just get this book. You do NOT need both.