From the back of the book:
An official Ptolus Accessory
The Monte Cook's PTOLUS COUNTER COLLECTION features new monsters from the Ptolus: Monte Cook's City by the Spire setting book, as well as dozens of character counters representing the most noteworthy MPC's from that book.
No minis required!
CONTAINS 200-plus Ptolus-specific counters (including counters from the Ptolus set adventure Queen of Lies). 100 counter images are brand new designs not found in any other counter collection produce[sic]