The Campaign is the fourth volume of four that make up the core rules for Seven Voyages of Zylarthen. There is an index with page numbers in the front.
The content of the book is chiefly reference material, tables and charts, guides for experience rewards and the creation of adventures.
from the Introduction:
The following contains a number of tables and charts referred to in the first three volumes as well as providing a few hints and ideas for running a campaign featuring both dungeon and wilderness adventures. Keeping to the original plan, there are no long bits about how to be a good referee or a successful player. These subjects are of course highly useful but have already been covered quite well by others.