Does anybody remember Weird Dreams on the Amiga? And did anyone ever get past the third or fourth screen? Man, that game was impossible.
Third? More like first. I am suppost to grab the stick to escape the machine, but I just can’t leap at the right time.
A good portion of the big ones have been mentioned, but Harlan Ellison’s I Have No Mouth and I Must Scream was turned into an adventure game (and Ellison sued the makers over it). If you count them as books, the Krynn novels rather than just the RPG were directly turned into three games: Heroes of the Lance, Dragons of Flame, and Shadow Sorcerer. I know of multiple games based on Dracula, Frankenstein, and Sherlock Holmes. Oddly enough Stephen King’s The Dark Half was turned into an adventure game (not my first pick for one of his novels to turn into a game; I suspect that this was a tie-in with the movie).
There have been a couple based on Pratchett’s Discworld novels.
And at least one based on Zelazny’s Amber series.
I mean REALLY based on. In fact, the way to win is to do everything the main character does in the first trilogy.
Also, at one point a phone rings. You pick up the receiver and have to say “Yes” to a question that is asked of you. However if you nod, somehow the other person knows you do it and reacts.
There was a game from the 1990’s called “The Dark Eye”. Well, it really wasn’t a game, but rather a bunch of Poe stories you went through in a mostly linear fashion.
There was a main plot that owed not a little to “The Fall of the House of Usher”, in a rather surealistic house, inhabited by creepy puppets(who are the characters). At times you’d be transported to a creepy,deserted, benighted doppleganger of the house where you’d find items that would transport you into Poe stories, which you’d play from two perspectives each.
In particulary, “A cask of Amontillado”, “Bernice”, and “The Tale-Tale Heart”. There were also Slideshows of “Marque of the Red Death” and “Anabell Lee” as the text was read aloud by a famous author whose name I can’t recall at the moment.
Text adventures for the Apple:
Stephen King’s The Mist
Arthur Clarke’s Rendezvous with Rama
Michael Chrichton’s Amazon (which morphed into the movie Congo about 10-odd years later)
I had forgotten about that. I guess it’s been so long since I played it.
Then again, it wasn’t a particulary great game.
No, it sure wasn’t. I was never very good at text adventures, but I remember that one as especially unilluminating.
Wait…It was a text adventure?
I was thinking of the one put out by Sierra in the late 1990’s.
Goes off to the site not to be named
I just can’t let myself be wrong. 
In 1976, Don Woods added elements of Tolkien’s work to one of the first games ever made, Colossal Cave Adventure , which itself was inspired by D&D, which itself started out as a kind of LoTR fan project. Which was in the short lived UPN sitcom as a Beholder with Kevin Bacon as the roomate of said Beholder. 
You beat me to it.
I still have this game for my PC, and I kinda enjoyed it.
If I remember I will see who the narrator is.
American McGee’s Alice, based on Alice in Wonderland.
How much does Halo borrow from Ringworld?
The concept of a ring shaped construct that people live in and that’s about it. I think the two Ringworld adventure games are a bit closer to the book (and in fact mine came with a copy of it).
Now that I think about it, Farenheit 451 was also turned into a text adventure. Oh, and there have been a few Asimov based games but I can’t remember titles off the top of my head.
I can’t remember who the maker of RwR was, but it was the same as Crichton’s Amazon. It was text with graphics, in that all your commands had to be typed in, and then the monochrome image on the screen would change to reflect what you had done. I don’t remember exactly when I got it, but I was living at home using an Apple IIe, so it had to have been in the late-ish 80’s.