From the publisher's website:
The Jade Regent Player’s Guide gives players all the spoiler-free information, inspiration, and new rules they’ll need to create characters prepared for the mysteries and exotic wonders of the Jade Regent Adventure Path.
Within, players of this campaign will find everything they need to create character backgrounds tied to personalities and events vital to Pathfinder Adventure Path’s greatest step into lands unexplored, along with new campaign-specific traits to give bold adventurers the edge they’ll need to take on the varied and unpredictable dangers of these new realms. New rules for caravans also give players the opportunity to build their own homes on the road, as well as conscript the companions and resources the'll need for this truly epic journey.
Adventurers don't need to start upon their expedition unprepared! Gather your allies and let the Jade Regent Player's Guide set your course into the legendary lands of the Jade Regent.