Stoneheart Valley (Swords and Wizardry) (2013)

From the Publisher Website:

Finally, welcome to the World of Necromancer Games! From Bill Webb and Clark Peterson's home campaign comes the old-school setting of The Lost Lands: Stoneheart Valley. For over a decade, fans of Necromancer Games and Frog God Games have been asking to see the world behind the adventures. And at long last, here is where it all began, in the Stoneheart Valley near the town of Fairhill. This mini-campaign was originally presented to the fans of Necromancer Games in three separate modules: "The Wizard's Amulet", "The Crucible of Freya", and "The Tomb of Abysthor". Frog God Games has taken the full series from the 3E version plus supplemental material previously available only online, and converted it all to the Pathfinder Roleplaying Game system and the Swords & Wizardry Complete ruleset.