I'm not fluent in statistics, so I can only go by anecdotes about my own gaming.
There are games that are actually based on real stories. One of the first games I bought from BFG was The Count of Monte Cristo. It's a hidden object game with creepy music, as various suspects are questioned in various locations. Eventually the villain is found.
I enjoyed the game, so I decided to read the novel. It took awhile to find an unabridged edition in English. It's sitting on my bookshelf right now, waiting for me to get into the mood to read it.
There are also games based on The Three Musketeers and The Man in the Iron Mask. And getting away from Dumas, one of the games I bought a few years ago was The Great Gatsby. Again, it's a case of "play the game, read the book". Except that I haven't read it. Yet. It's on my Kindle, waiting to be read. I've got fanfiction on my mind, though, so it'll be awhile.
Hmm... and just now, I suddenly had an idea of how to turn one of Poul Anderson's Time Patrol stories into a game. I'll have to think on that a bit more.