The Seventh Arm
The PCs intervene in an attempted murder and are hired to find out what made a guy go mad. This leads them to search for Yenejg Togan's tower/a strange merchant in the nearby forest, where they discover that bugbears have moved in. After exploring the tower, finding the "merchant", and dealing with the bugbears and the lamia that caused the incident in the first place, they were still unable to get into Yenejg's inner sanctum without a key.
The PCs return with the key and figure out how to use it to enter Yenejg's sanctum. They then explore it, dealing mostly with traps, and finally discover the resting place of the treasure Yenejg stole from the town.
This adventure begins with a skill-based roof-top chase and can include some complex non-combat interactions with potentially hostile NPCs. It includes some semi-interesting traps as well as some nifty puzzles. No villain to speak of. Fool-hardy adventurers can get themselves killed, but some caution will result in only one extremely hard fight, and even that can be avoided if action is taken quickly.
Pgs. 74-107