"The first in our Drop-in Foes series, add Haruunk, goblin god of annoyance and petty theft, to your adventures.
Followers of Harrunk can be enemies, allies, or even player characters in your next campaign. The Gooseriders of Haruunk contains everything to drop them in your game.
Background on Haruunk and their goals
A warlock pact with Haruunk
New spells and items themed around geese
And new creatures."