I've played RotK 7,8, and 9. Also pretty much every dynasty warriors game aside from the first two. While they aren't good sources, it does capture the umm... heroism of the period. I'm looking for a more RotK based game, with an emphasis on stories but with a grounding in history.
I've read the first volume of the actual historical novel. However, it's nearly impossible to get an unabridged copy of the Moss Roberts translation (the best translation in the opinion of those I've talked to) in Canada so no luck getting the second volume. I still can't believe my friend found the first volume. Hopefully I'll have better luck when I get to Korea.
I plan on picking up a translation of the Records of Three Kingdoms, a partially primary source (the author served Liu Shan, so he was alive during the end of the period), when I'm in Korea.