The sixth large expansion to the game Carcassonne is actually a compilation of three existing small expansions and a new one.
This compilation contains:
7 tiles out of Carcassonne: King & Scout (the King & Scout tiles extending Carcassonne: Hunters and Gatherers are not included in this expansion)
Carcassonne: The Count of Carcassonne
Carcassonne: The River II
Carcassonne: The Cult, which was first made available in this compilation.