Baumi
Adventurer
Aberzanzorax you asked about the Savage Worlds Main Book... That would be the "Savage Worlds Explorers Edition", it contains all the rules, all the equipment and powers to play every genre out of the box.
The other Books are mostly Setting Books (most with a complete Sandbox Campaign .. the Plot-Point Campaigns). There are a few Genre Books which gives new feats and insight to several Genres like Fantasy or Supers. And there are also a few book that are stand-alone, like Salomon Kane which include the World, the Rules and Adventures.
If you are the GM I would recommend the Savage Worlds Explorer's Edition and one Plot-Point Campaign (like Slipstream or Sundered Skies). With just two book you have a full Campaign, World and all the Rules to last for years!
The other Books are mostly Setting Books (most with a complete Sandbox Campaign .. the Plot-Point Campaigns). There are a few Genre Books which gives new feats and insight to several Genres like Fantasy or Supers. And there are also a few book that are stand-alone, like Salomon Kane which include the World, the Rules and Adventures.
If you are the GM I would recommend the Savage Worlds Explorer's Edition and one Plot-Point Campaign (like Slipstream or Sundered Skies). With just two book you have a full Campaign, World and all the Rules to last for years!