Detailed maps of all the kingdoms of Westeros and related fields, interspersed with pictures of castles and cities from, between illustrations of people and events from the history of the seven kingdoms, some of them from the novels, the annual calendar and the film series known, while others are new to created this work.
The illustrations provide a successful framework for the background story of Martin's world.
But you should know that there is no continuation of the series, but another attendant work, as the cards that calendar or cookbook. Also, most texts do not come from the pen of Martin, but were written with his agreement and his control.
But it is clearly something of Ice & Fire fans.