It is always very interesting when one of your favorite books makes it onto the screen be it TV or movies. You always wonder if it will be portrayed the way you imagine it. Before the extensive use of CGI and computer effects it was never even attempted. Large scale epics were just way too costly. Only big budget movies could even attempt it.
But it is all different now. The Lord of the Rings being the most prominent example along with Jurassic Park. Computer generated CGI lets you have armies of orcs and elves and dwarves. Even a pissant little series like “Once Upon a Time” can really generate great special effects at a much reduced cost. So books that you never thought could be on the screen are suddenly viable. What is interesting is the ones that they choose and the ones that are successful.
The one that most people point to is George Rape Rape Martins “Game of Thrones.” It has become one of the most popular and talked about fantasy series of all time. Most of it is pretty true to the books. The problem for them is the Martin is famously lazy and can’t seem to produce more books for the series to produce for TV. They caught up to him pretty quickly.