I finished reading George R.R. Martin's book A Game of Thrones a few months ago. I'm not sure when I'll get around to reading the subsequent novels, because of their length and lack of closure. However, since I admire the author's world-building skill, I'll take a divergent course and delve into the various Westeros-based games as I can.
One such game is the Song of Ice and Fire Roleplaying (RPG) system by Green Ronin Publishing. Since I'm involved in two Star Wars RPG campaigns, I wasn't in the mood to learn a new gaming system. However, I've read great reviews about it. One such review comes from Geek's Dream Girl, that I found via Dice Monkey.
What I did read, cover-to-cover, was the Song of Ice and Fire Campaign Guide. There are four 5-star reviews for this book on Amazon.com, including mine. I would recommend this book to anyone interested in Martin's Song of Ice and Fire saga. Gamers and non-gamers would benenfit having this book as a "Who's Who in Westeros" reference guide.