Brace yourselves, I'm definitely not as well-read as many of you, but I think I have some good shit:
Richard Matheson's 'I Am Legend':
This is the quintessential modern vampire/zombie apocalypse story. Just like in a RPG, Robert Neville goes from nobody to nightmare (in the eyes of real fuckin vampires). He starts out as an average factory worker and a veteran, but through necessity he becomes his own doctor, dentist, mechanic, and vampire biologist/exterminator. Every night he has to hold on for dear life to his sanity and sleep as people he knew taunt him and proposition him for sex to come out and be sucked dry (double entendres intended) at least until he sound-proofs his house/survivalist bunker. Each day is a hunt for resources and vampires to stake as well as checking for and repairing damage to his bunker. He also heads to the library and learns skills like a BOSS!
The game would obviously be a real-time survival horror RPG. Progression would focus on knowledge, survival skills, and bunker building. You have no chance in combat. Getting stuck outside dusk will take running/driving and clever use of the environment to have a chance of getting to safety. The goal of the game is to kill as many vamps as possible and confront your death at the hands of the new vampire society with a reputation score of 'Legend'.
Charles Frazier's 'Cold Mountain':
I had to read this in high school, but it is an awesome story set during the American Civil War. The protagonist, Inman, is a Confederate defector escaped from a filthy hospital after having his neck torn open in combat. He just wants to get home and see if the woman he loves is still alive and available still. Along the way he has to contend with bounty hunters and Confederate defector death squads trying to kill him. The relevance to RPGs comes in the fucking awesome historical (but impractical in actual history) weapons he comes across and uses to satisfying effect, including a big ass revolver with a shotgun barrel secondary fire and a scoped sniper rifle (in one fight he also wields a scythe!). My book report was on interesting weapons and equipment carried by soldiers during the war and those used in the book. To some up, the book has a badass protagonist, interesting non-combat encounters, absolutely nightmarish pursuing antagonists, and cool loot! Make it turn-based, and give the CRPG some stealth elements. For some survival/psychological horror flavor, see
Stephen Crane's 'The Red Badge of Courage'.
L Frank Baum's 'The Wonderful Wizard of Oz':
I know there was already a pretty godawful NDS RPG based on this, but I can't stress enough just how surprisingly awesome the original story was. For one thing, the book has the concept of the adventuring party in a fantasy land long before Tolkein (though
'Journey to the West' is even older and does have an average-playing Final Fantasy Tactics clone
https://gamefaqs.gamespot.com/ps/480705-saiyuki-journey-west/reviews ). The characters are seeking to improve themselves within society (not to become "stronger"), or in Dorothy's case she is just trying to get home. Very few of OZ's inhabitants are outright good or evil (in the book, the "Wizard" also conned everyone into wearing green-tinted googles for a BS reason to make them think the Emerald City is actual Emerald in color).
Anywho, I just think this is a pretty interesting world that CRPG quests could be set in. The original story wasn't some ordinary saccharine childrens' affair either. More like a classic fairytale, there is violence present just as in the real world (the tinman, who is really a ship of Theseus made out of body horror, decapitates fuckin tiger-headed bears and other unlucky denizens in the party's way), so the world does not thematically hinder story possibilities. Imagine a cynical and sometimes bizarre world in a QfG type adventure CRPG... with lots of axe-murder...
H G Well's 'War of the Worlds' and 'The Time Machine':
WotW would be a fun game to try and survive in. Plus, there could be strategic battles where the military can actually fight back and win against the tri-pods, which are simply really fast compared to the artillery units at the time and far better armed rather than armored or energy shielded. The progression system has to do with the enemies becoming weaker as they begin to get sick rather than your humans becoming legendary heroes. Nonetheless, the military become more effective, and the challenges your civilian refugees face as the aliens get sicker and more unpredictable would change the longer you play.
The time machine would be fun with an exploring party of experts going to different times to explore the fantasticly altered world and help people along the way.
I'm not sure if
Isaac Asimov's 'I, Robot' stories' world would work for a CRPG, but I thoroughly enjoyed them.
Last book I can think of right now is
Austin Grossman's 'Soon I Will Be Invincible':
It's a funny cynical take on super heroes and villains with warped takes on the JLA (Catman, the Batman expy, gets his standoffish and analytical behavior from having autism!), and corny old comic book superhero plots happen, but the book's universe takes them seriously when not lampooning them in-universe! It's a vey fun relatively short read, and I would love to play an aspiring super hero or villain in that verse!