D&D accessory modules produced from 1989 - 1992, and set in the world of Mystara.  Each takes a certain environment and details the peoples, monsters, magic items, and spells therein, as well as provides short adventures.

PC1 Tall Tales of the Wee Folk by John Nephew
PC2 Top Ballista by Carl Sargent
PC3 Sea People by Jim Bambra
PC4 Night Howlers by Ann Dupuis

PC1 Tall Tales of the Wee Folk deals with the races of Faerie; PC2 Top Ballista humorously describes the flying city of Serraine, and the creatures that live there; PC3 Sea People provides rules for underwater adventures and descriptions of underwater races; PC4 Night Howlers probes the world of the lycanthropes, and includes a mini-campaign setting (thanks to Richard van Tol for help with this info).

Printing Information

There are no distinguishable printings between modules.
 

PC1 Tall Tales of the Wee Folk

Thanks to Richard van Tol for the scans.

Tall Tales of the Wee Folk	Top Ballista	Sea People	Night Howlers

These four accessory modules are actually quite scarce; we've given them a Rarity value of 2, but they're a borderline 3. 

• PC1 Tall Tales of the Wee Folk
• PC2 Top Ballista
• PC3 Sea People
• PC4 Night Howlers