From the introduction:
This book is a resource book for tabletop role‐playing games set in a post‐apocalyptic world. Random tables help gamemasters cut prep time by answering questions right at the table.
Post‐apocalyptic RPGs often revolve around the player characters searching for supplies and equipment amid the ruins. The tables in this book make the GM’s job easier.
The first two tables are for the GM. The Gang Names table is exactly that, helpful names when you need one in a pinch. The Highway Encounters table gives adventure ideas and scenarios when running sessions without preparation.
The other 27 tables are for use when the player characters search buildings, cars, piles of junk, and whatever else they encounter.