I've read all the books to date and have to rank them among my favorites, the 5th book of 7 or 8 planned is coming out this summer after a long wait. The problem HBO is going to have is trying to fit all the information and background stories into the show so that viewers will have an understanding of the characters and their old hatreds, alliances, distrusts, etc. The books' characters are very well developed with many having their chapters and storylines that will be difficult to really delve into in a dozen or so episodes. The motivations of each character change and move around quite a bit so deciding on who is good or evil is sometimes a fine line. The books also give a lot of detail about why some are the way the are, i.e tragic events or horrible upbringing. I won't give away anything that wasn't in the first episode other than a bit of background that may or may not be evident right away. Most of the story focuses on the corruption, fight for power, politics, and of course fighting, while slowly teasing out more information about each character. There aren't wizards like Gandalf, or strange non human Orc armies threatening, other than trying to figure out what is going on beyond the Wall. Basically, Ned Stark and Robert Baratheon (the current King) led a rebellion against the old King, whose sole surviving family members are on the run in an another land across the sea, Daeneyrs and Viserys Targaryen. Their family ruled for many generations and are a bit mad - - incest will do that. They came to power on the backs of dragons, which have all since vanished. Viserys has delusions of granduer about returning to power. The guy who appears to Daeneyrs at her wedding and is from Westeros, her home, was once once of the King's elite guards for her father. The old king was killed by Jamie Lannister who was supposed to be guarding him and his family as part of his elite guard. His father was the King's Hand, or right hand man. The Lannisters are the richest family, their home is on top of a gold mine and they crave power. Jamie and his father basically switched sides from the King to the rebels at the last minute when defeat looked real and sort of said, "See we were with you all along." Nobody trust them, but they are powerful, Robert agreed to marry the daughter ( he wanted to marry Eddard Stark's sister but she died), Jamie's twin, Cersei, to try and keep them loyal and providing gold. The incest between them in the first episode is in the books, they sort of view themselves as potential heirs to Targaryen empire and take on their incestual habits. They are the extreme narcissists. They also have a dwarf brother, Tyrion, who in the books is much more deformed than just being a dwarf. He is sort of a genius and one of the best characters in the books in my opinion. He isn't too fond of his sister but idolizes his dashing, elite warrier brother a bit. The current Hand of the King, Robert's right hand man died, hence Robert trekking way north to ask Eddard to come replace him. Eddard's wife gets a note from her sister saying that the Hand of King was murdered. Her sister was married to the guy and fled to the family castle in east. As the opening scene showed there is a giant ice wall way to the north. It is manned by men called "Crows" for their dark clothes. It is sort of an exile for criminals, poor, etc. They guard the wall. There are people on the other side of the wall called Wildings, they sometimes scale the wall and raid villages, etc. But there is also an old legend about White Walkers, or The Others, a sort of walking dead that inhabited the other side of the wall long ago. Most believe it just a fairy tale. The wall is very ancient and the construction of it is somewhat unknown IIRC. The people of the north where the Starks live have more contact with the Crows and tend to believe more in its importance. The further south you go the more people view it as just a bleak place to send criminals and such. Eddard Stark has two daughters, three sons, and an illegitimate son, Jon Snow. He also has a brother who serves on the Wall, as well has ward of one of his underlords, Theon, who is about the same age as his oldest son and illegitimate son. King Robert has 2 brothers who will appear later. There are also a number of other important families from other regions that each have their own agenda and loyalties.