From the Back of the Book:
Looking to match steel and strength with the Black Knight, a forbidding armored figure new to Lankhmar? He's in here. Need to find out about the Vermin Catchers or the crafty Beggar's Guild? Look inside for all the information you'll need to catch them. Are you looking for new thrills for your City of Lankhmar campaign? If so, this is the book for you.
Rogues in Lankhmar is the first of a series of supplements that expand the information on the city of Lankhmar. This initial product covers the Plaza and Tenderloin Districts, a favorite place for FAFHRD and the GRAY MOUSER in the city and an area notorious for tavern brawls, back street thievery, and all sorts of excitement and danger. Rogues in Lankhmar provides Dungeon Masters with new places detailed and ready for adventure, new guilds and groups vying for power in Lankhmar's shadowed streets, and many new nonplayer characters for allies and enemies galore.
Whether it's sunset at the Plaza of Dark Delights or sunrise at the End Gate, the adventure never stops in Lankhmar!