From the front of the book:
Ptolus e-Adventure Tiles: Ghul’s Labyrinth I lets you customize miniatures scale encounter areas in the dungeons beneath Ptolus. This set of 30 six inch square tiles details the most common types of passages, chambers, and chamber clusters found in Ghul’s Labyrinth, described in Chapter 19 of Ptolus: Monte Cook’s City by the Spire. Details include scattered stone, bones, broken armor and glass, and other detritus left behind by delvers over the years. In additions, there are five alternate tiles featuring doors unique to Ghul’s Labyrinth and Delver’s Guild waystations. Five bonus tiles finish out the set with links to Ptolus e-Adventure Tiles: Sewers and other e-Adventure Tiles dungeon sets.
Use the thumbnail tiles in the Introduction file to design your Ghul’s Labyrinth encounters. Print only the tiles you need, trim them out, and they are ready for the tabletop.