Rough the first half of the book covers the entire history of the saga of Martin, so from the origins to the Kingdom of Baratheon.
The second half is more geographically oriented: descriptions of the kingdoms, the free cities and of all places, which has been heard in the books of Martin. There are also numerous maps and coat of arms, which make the book colorful.
The annex three large pedigrees (Targaryen, Lannister, Stark), of which the most interesting by far is from the Targaryen!
So overall a kind of history / geography book, as this would in fact be for a young King of King's Landing was written. From the price, this book is definitely worth!