From the front cover:
Welcome to the world of Cerilia, home of the Birthright Campaign Setting for the Advanced Dungeons and Dragons Game.
You hold in your hand an overview of this land, its people, and its history. Open the conspectus to begin learning about the regal world of Birthright: For when greatness by right is thrust upon you, it is best to be ready.
This was a promotional poster designed to introduce the Birthright line, but it's actually a useful supplement in its own right, particularly for players. It summarizes the core concepts of Birthright, introduces most of the cultures, and unfolds into a 31.5" x 21.5" map of Cerilia.