This is a delightful resource, a wander through some of the cities in the world of Camelot Cosmos.... but a wealth of detail that would provide flavour to any steam-fantasy setting even if you do not use this one which you ought to try if you like steampunk meets fantasy with a bit of chivalry thrown in.
There is a lot crammed in here. It's more flavour than hard fact with everything from likely names of street gangs to notes on the Gentlemen Assassins and Unseelie influences... Evocative descriptions of the Factols - distinctive bastions of industrial might - jostle with tables of Wyrd Effects and discussions of the war economy, Fyrd patrols and the role of Hags, grotesque crones with oversight duties within the Factols.
Some bits are very setting specific, although there is little rules 'crunch', but much could be transplanted elsewhere if your fantasy setting is subject to heavy industrialisation in steampunk style - I can think of a couple of games in my collection in such a style for which this might be raided.
This makes for an entertaining and flavourful read. While it is primarily aimed at the GM, there is little conflict in allowing players access if they want to get more of a feel for the world in which their characters live.