From the introduction:
This module is the second part of a continuing adventure called the Forgotten Empire Trail that takes part in the northwestern part of the fantasy role-playing world known as the jörð. It continues where the first part of the adventure ended, at the conclusion of Module No. 1, entitled Too Many Clues.
If you have not run Too Many Clues, we certainly urge you to do so. It contains a considerable amount of information that you need to run a campaign on the Forgotten Empire Trail and that your players and their PCs will need to adventure successfully there.
The product is published as two separate ODT files.