I started working on Saga of the Goblin Horde back in December 2015, and I've released a lot of content for it since then, but now I've finally finished the full setting book! So without further ado...
The book contains the same information as the player's guide (introduction to the setting, 5 new races, 41 Edges, 20 Hindrances, weapons and armor, setting rules, deities, gazetteer, and map), but also includes the Game Master's section (setting secrets, a plot point campaign, a load of adventure seeds, an adventure generator, and a large bestiary).
Don't forget to grab all the other stuff for it, like the archetypes, One Sheets, etc. You can get them all here.
EDIT: The setting book is now listed on DriveThruRPG, I've updated the link accordingly.