There are section on the economy, government, demographics, flow of information, extensive random encounter tables fro day/night for each district, Interesting Events tables that might happen once a week, etc, etc, etc.

PLUS - beneath the city, there are numerous adventuring areas that can provide literally years of gaming fun: The Sewers, Ghuls' Labyrinth, the Caverns of the Galchutt, and abandoned Dwarven City, extensive natural caverns that eventually lead to a deep Dark Elf inhabited area, The Banewarrens beneath the Spire, the Spire itself, the ruins of the first city of Ptolus built and destroyed several thousand years ago, the Vaults of the Rhodintor, the Serpent Caves, the Eternity Caves....the Prison, The Slave city and the Undercity Market.

I own both the Big Book (which you can get on e-bay for ~$80) and the pdf version which is immensely useful in locating every entry where The Pale Dogs are mentioned.

When you buy the Big Book you get a coupon for 25% off any Ptolus related product at DrveThru RPG (including the pdf version of the book), and there are lots of great support products such as the great SkeletonKey Games battlemap printouts for the Swers, Ghul's Labyrinth and several of the adventure path seeds contained in the Big Book.

OK - I'm done. Buy Ptolus - no way you'll regret it, even if you DO pay full price ($120)

Oh yeah...almost forgot:

You can get lots of very useful, fan devloped content here:

The Delvers Square

There is a new copy of the Big Book on e-bay right now for only $57 + $6 shipping.

Auction ends in 3 hours...