Odhanan said:
For the record, I count all Wizards and White Wolf productions as RPG related. The same way, authors that have RPG versions of their work, such as HP Lovecraft and Michael Moorcock are RPG related.
You are wanting to know if we read novels OTHER than those related to an RPG. Thus Lovecraft, Howard, Moorcock, Lieber, Tolkien, Stoker, Burroughs, Jordan, Cook are all banned. And if you include RPG's based on real world earth (Roman Age, Age of the Shogun, Civil War etc), you'll find very few (if any) books that are not, in some way (however faint) RPG related. (The Art of War by Sun Tzu is mentioned in at least 2 RPG supplements I have).
Perhaps the better question is what books do you read, not brung to your attention by an RPG.
For example, I began reading Lovecraft before I knew about Call of Cthulhu. However, many of the Lovecraft works I've read since (the stuff by Chaosium; I really recommend the Book of Dyzan). I also tracked down Lieber's work based off of D&D.
However, Moorcock & Robert Howard I read well before I knew there was any RPG connection. I just finished Salmon of Doubt (I've seen the Hitchhiker's Guide to the Galaxy's influence in more than 1 book).
It's sort of like saying which artists do you like that aren't RPG related. You know people like RK. Post, DiTerlizzi, Brom. And those other guys, like Frazzetta & Davinci.
It's hard to claim an author (himself) is RPG related when he died 50 years before RPG's appeared (like Robert Howard, or 2,000 years for my buddy Sun Tzu). You might see RPG conventions is both Howard's Conan & Jordan's Wheel of Time; and Jordan might have been influenced by RPG's; Howard I think not.
As for me I still read the FR paperbacks as they come out. Much like Ho-HO's I keep telling myself I'll stop, but then I go buy Maiden of Pain & regret it in the morning.
I read all the Warhammer fantasy novels. But I don't play Warhammer (RPG or miniatures game). I have no desire to ever play either. Even if d20 rules came out, I wouldn't want to play it. I just enjoy reading the novels.
I think your question is flawed as it is too broad. RPG's are a genre that relies heavily on the works of the past. If you dig hard enough ANY author can probablly be connected to an RPG in some way.