This system neutral supplement is pure magic. it takes a look at the Americas, especially North America through a fantasy lens. the time period the book is mainly concerned with is something roughly analogous to the 1930's, although the game uses a different dating convention. Fantasy North America or Septentrion as it is called here is a land of danger and adventure, with hillbilly giants, dust bowl zombies, infernal gangsters, goblin hobos and much much more.
The book provides a wealth of detail on both the northern and southern continents of the new world, with a particular focus on the Union, a nation which is similar, but hardly identical to the US. The star of the book, though is Empire City. Located in the north east of the union the City (as it is most often referred to in the text) and situated over primeval ruins and subterranean complexes left behind by the ancients, is a richly detailed setting all in and of itself worthy of several years worth of gaming.
anyway, I'm not big on published setting, but I'd run this one in a heartbeat.
[5 of 5 Stars!]