Terror at Wulf's Head: PFRPG 1st Edition Addendum

From publisher blurb:

This product is a conversion addendum of Terror at Wulf's Head by Frog God Games. That product is required to use this addendum.

Terror at Wulf’s Head is an adventure set in the Northlands of the Lost Lands’ setting. Ken Spencer, creator of the Northlands and prolific contributor to the growing opus of the Lost Lands , brings you a tale of  Viking fury, unearthed terrors, and a rescue mission across untamed wilderness. Of course, the heroes will discover deeper secrets along the Savage River: family squabbles, hidden ruins of the long dead Andøvan, greedy jarls, and spiders. So many spiders. Gliftenflyt, the Huscarl of Spiders, has awakened, and her children run rampant!