This PDF is the first in the series and came free on the bonus CD with Ptolus: Monte Cook's City by the Spire
From the front cover:
Welcome to Ptolus Adventure Maps: Korben Trollone’s Office. Inside you will find nine terrain tiles detailing two floors of this South Market business and the secrets that lie below it.
From within these walls “Korben the Keeper” operates a criminal organization that covers the entire South Market, collecting protection money from businesses, running a number of small-time gambling operations, and managing a pair of brothels.
Ptolus Adventure Maps feature detailed miniatures scale map tiles of locales pulled straight from the pages of Monte Cook’s Ptolus! Simply print them, trim them out, and bring the excitement of the City by the Spire to your tabletop.