This next adventure was a commissioned piece of work, for both the writing and the maps that come with it. It is currently a Best Silver Seller.
Ruined City of Cyfandir
From the site:
From the imagination of designer and cartographer Simon Forster, creator of the Book of Lairs and the popular OSR blog Sky Full of Dust, comes a new adventure for characters levels 5-7.
Two hundred years ago, the elven capital of Cyfandir fell to the savage assault of the Great Dragon Aisoth, self-proclaimed goddess and sovereign of the lizardmen who followed in her wake. The elves, occupied with the Argollëan War, were unprepared for the attack and the city fell swiftly. The elven residents fled, many dying at the claws and teeth of the lizardmen who waited in ambush in the forest.
Now the city lies in ruins, its walls crumbled and alabaster towers fallen to rubble, and the forest is crawling across its streets. Ivy and moss cover the walls of once-pristine buildings, and piles of rubble mark the passage of the dragon. Only the majestic and imposing Great Hall still carries its ancient grandeur. It is there that the Great Dragon makes her lair, sleeping atop the a treasure trove of elven coins, jewels, and artifacts.
Only the bravest adventurers will dare to plunder the ruins of Cyfandir…
AX4: Ruined City of Cyfandir (ROC) is a ready-to-play adventure scenario presented for use with the Adventurer Conqueror King System™ (ACKS) and other d20-based fantasy role-playing games. Explore the vast ruined city of Cyfandir and discover the secrets of the fallen kingdom of the elves.
All maps in the adventure are provided in hi-resolution format as individual downloads for easy use online.
If your game of choice is 5E, the adventure is also available in 5E-compatible format at https://www.drivethrurpg.com/product/264551/Ruined-City-of-Cyfandir-5E
It is my first (and so far only) commission to write something for somebody else, and I enjoyed the experience and would welcome more down the line.