Another good sourcebook from Melior Via.
Frost and Fang adds describes two more nations of the world of Morden.
In a nutshell, this gives you more background, more character hooks, and more flavor for your Accursed games, along with some fun Hinderences and Banes.
The price point is excellent for what you get, and as Accursed is a game where the mood and tone of the world is an important part of the game, Frost and Fang makes that part much easier and fun for the GM.
Well worth it.