Well, this may only be of interest to The Grue, as I don't know of any other gamers here who are playing in Pathfinder campaigns. I just started reading the novels in the series and quite frankly I've been surprised by the excellent quality of them. To date I've only read 2, but I post this here because both have been good enough to recommend to fans of fantasy literature who know nothing of the setting. As well, with a Pathfinder MMORPG on the horizon, they might eventually become more pertinent to the interests of gamers here. Obviously it goes without saying, that coming from a PnP system derived from D&D 3.5, a number of the conventions and premises in the books are going to be familiar to fans of any D&D version.
The books in the series I've read so far:
A very interesting read about a Paladin who reigns from all places an atheist nation. Without spoiling too much; through twists of fate he's come to serve a deity named Pharasma who he has no kind words for - very strange, but works surprisingly well. Consequently the main protagonist personality is very deep and well developed in the story. Other protagonists are immigrants to an off the beaten path city and kingdom, which make it approachable for people unfamiliar with the setting. Hard to believe it was the author's (James L Sutter) 1st novel. He's gotten a decent amount of recognition for it - #3 on Barnes & Noble's Best Fantasy Releases of 2011 and made it to the finals for the Compton Crook Award for Best First Novel. This novel is easily one of the best novels I've read set in a PnP game setting.
This is one tale of dark magic and intrigue - far darker than most fantasy novels I've read which brag on being set in Dark Fantasy worlds. The 1st 50 pages of this were strong in the gloomy department and wondered if it would ever lighten up, which it thankfully did. It's got its share of horror elements, so it would probably appeal to readers who like that side of fantasy lit. It follows the main protagonist from childhood to young adulthood, so it nicely details the development of a Wizard character. Unlike Death's Heretic, this is set amongst one of the main kingdoms in the Pathfinder setting, but its detailed so well that you really don't need knowledge of it. It's written by Liane Merciel, who's apparently written other novels based on her own world setting of Ithelas. IMO a terrific dark fantasy novel, that could be enjoyed by readers who don't know about the setting.
Next up for me is the Prince of Wolves, which was one of the 1st Pathfinder Tales written, but also the best reviewed. I'd love to here about others in the series than anyone here might have read.