Haven: Secrets of the Labyrinth (1983)

from the back of the book
In HAVEN — The Free City, gamers were introduced to the bustling trade city of Haven, where opportunities for adventure, intrigue, and excitement waited on every street corner. Now the saga of the city continues in HAVEN — Secrets of the Labyrinth

In this second volume of the HAVEN series, GMs will find detailed descriptions of over 120 shops, taverns and residences, numerous random encounters, and hundreds of NPCs…

Secrets of the Labyrinth also includes 10 detailed neighborhood maps, completing the entire south side of the city, and showing such areas of interest as the South Docks, where shipd of many lands come with their fabulous cargos, the colorful bazaar called the Thieves' Market, and the forbidding towers of the city's prison, the Gray Halls.