Akrasia
Procrastinator
Odhanan said:... The same way, authors that have RPG versions of their work, such as HP Lovecraft and Michael Moorcock are RPG related.
With this line of reasoning, you should include J.R.R. Tolkien as well -- two RPGs have been explicitly based on Middle-earth, and Tolkien's overall influence on the field cannot be overstated.
The D&D magic system is based on the works of Jack Vance. So does he count as 'RPG related'?
But as soon as you include Tolkien, Vance, Moorcock, and Lovecraft as RPG related, the question you ask becomes meaningless, since I would assume that the vast majority of people who play FRPGs have at least read something by Tolkien.
That aside, I have had the misfortune of reading a few D&D-based novels (some Dragonlance stuff, and a few things by Salvatore). Pretty mediocre, IMO, but usefully dormative (I sometime suffer from insomnia). I've also read a few Warhammer novels (Witch Hunter and Witch Finder), which were competent, but not great (though they did help me get into the 'Old World' ethos a bit).