From the publishers website: Tales of the North: The Ordan Valley is a Labyrinth Lord compatible adventure module for 4-8 characters of level 1st to 3rd. This module includes a base of operations and five short adventures. The borderland has for over a thousand years marked the northernmost progress of human civilization. The border is not a line marked on a map but a tide advancing and receding. The Borderland is the tidal plane between high and low tide claimed by both wilderness and civilization but held for long by neither.