This book has just about everything you need to start a new campaign. There is just enough information about the history and world in which Thornwall is set to get things rolling for players, but the star of the show is the immense and immersive town of Thornwall. The author gives detailed descriptions of the locations and includes tempting little sidequests from some of the more interesting NPCs and Places to make any PC want to just spend a few game sessions in town. The Goodwill mechanic adds some spice to PC interactions and the adventure included in the supplement brings it all together.
Oh, did I forget to mention that the maps and art are all top notch and the price is only a recommended $8 for 160+ pages of rpg goodness! If you just need to flesh out a town in your own campaign then this is well worth the price.